B767 200-300 BOOK 23 101 - Communications

B767/23/101 Communications

Boeing 767-200/300

Communications Training manual For training purposes only LEVEL 1

ATA 23

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This publication was created by Sabena technics training department, Brussels-Belgium, following ATA 104 specifications. The information in this publication is furnished for informational and training use only, and is subject to change without notice. Sabena technics training assumes no responsibility for any errors or inaccuracies that may appear in this publication. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Sabena technics training.

Contact address for course registrations course schedule information Sabena technics training [email protected]

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LIST OF EFFECTIVE PAGES 1................................................ 11 - 04 - 2012 2................................................ 11 - 04 - 2012 3................................................ 11 - 04 - 2012 4................................................ 11 - 04 - 2012 5................................................ 11 - 04 - 2012 6................................................ 11 - 04 - 2012 7................................................ 11 - 04 - 2012 8................................................ 11 - 04 - 2012 9................................................ 11 - 04 - 2012 10.............................................. 11 - 04 - 2012 11.............................................. 11 - 04 - 2012 12.............................................. 11 - 04 - 2012 13.............................................. 11 - 04 - 2012 14.............................................. 11 - 04 - 2012 15.............................................. 11 - 04 - 2012 16.............................................. 11 - 04 - 2012 17.............................................. 11 - 04 - 2012 18.............................................. 11 - 04 - 2012 19.............................................. 11 - 04 - 2012 20.............................................. 11 - 04 - 2012 21.............................................. 11 - 04 - 2012 22.............................................. 11 - 04 - 2012 23.............................................. 11 - 04 - 2012 24.............................................. 11 - 04 - 2012 25.............................................. 11 - 04 - 2012 26.............................................. 11 - 04 - 2012 27.............................................. 11 - 04 - 2012 28.............................................. 11 - 04 - 2012 29.............................................. 11 - 04 - 2012 30.............................................. 11 - 04 - 2012 31.............................................. 11 - 04 - 2012 32.............................................. 11 - 04 - 2012 33.............................................. 11 - 04 - 2012 34.............................................. 11 - 04 - 2012 35.............................................. 11 - 04 - 2012 36.............................................. 11 - 04 - 2012 37.............................................. 11 - 04 - 2012 38.............................................. 11 - 04 - 2012 39.............................................. 11 - 04 - 2012

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TABLE OF CONTENTS 1. FLIGHT INTERPHONE SYSTEM. ............................................................................................6 1.1. General................................................................................................................................6 2. CABIN INTERPHONE. ............................................................................................................8 2.1. General................................................................................................................................8 3. SERVICE INTERPHONE. .......................................................................................................10 3.1. General..............................................................................................................................10 4. CREW CALL. ........................................................................................................................12 4.1. General..............................................................................................................................12 5. PASSENGER ADDRESS SYSTEM - GENERAL. .....................................................................14 6. VHF COMMUNICATION SYSTEM. ......................................................................................16 6.1. General..............................................................................................................................16 6.2. Component Description. ....................................................................................................19 6.2.1. VHF Control Panel. ...................................................................................................19 7. HF COMMUNICATION SYSTEM. ........................................................................................20 7.1. General..............................................................................................................................20 7.2. Component Description. ....................................................................................................23 7.2.1. HF Control Panel. .....................................................................................................23


LIST OF ILLUSTRATIONS CABIN INTERPHONE SYSTEM ................................................................................................... 9 COMPONENT LOCATIONS ..................................................................................................... 18 FLIGHT INTERPHONE SYSTEM .................................................................................................. 7 FORWARD ATTENDANT’S PANEL ............................................................................................ 29 GENERAL DESCRIPTION ......................................................................................................... 39 GROUND CREW CALL SYSTEM .............................................................................................. 13 HF COM COMPONENT LOCATIONS ....................................................................................... 22 HF COM CONTROL PANEL ..................................................................................................... 23 P.A. INPUT 3 OPTION .............................................................................................................. 14 PASSENGER ADDRESS SYSTEM .............................................................................................. 15 PASS ENT & SERVICE SYS INTRODUCTION.............................................................................. 27 PES VIDEO SYSTEM ................................................................................................................ 31 SERVICE INTERPHONE SYSTEM .............................................................................................. 11 SYSTEM INTRODUCTION........................................................................................................ 37 TYPICAL HF COM SYSTEM ..................................................................................................... 21 TYPICAL VHF COM SYSTEM................................................................................................... 17 TYPICAL VOICE RECORDER SYSTEM ...................................................................................... 32 UNDERWATER LOCATING BEACON........................................................................................ 35 VHF COM CONTROL PANEL ................................................................................................... 19 VOICE RECORDER CONTROL PANEL....................................................................................... 33

8. PES - GENERAL....................................................................................................................24 9. PASSENGER ENTERTAINMENT SYSTEM. ...........................................................................26 10. PASSENGER SERVICE SYSTEM. ........................................................................................28 10.1. PSS Block Diagram. ..........................................................................................................28 11. PES VIDEO SYSTEM - GENERAL. ......................................................................................30 12. VOICE RECORDER - GENERAL. .........................................................................................32 12.1. Component Description. ..................................................................................................33 12.1.1. Voice Recorder Control Panel. .................................................................................33 12.1.2. Underwater Locating Beacon. .................................................................................34 13. ELT - INTRODUCTION .......................................................................................................36 13.1. Purpose ...........................................................................................................................36 13.2. General Description .........................................................................................................38

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ABBREVIATIONS AND ACRONYMS AAU ACARS ADF ADRS AM AMPL ANT APU AUX BRD C CDU CLR COM CTD CTR CTR CVR DC deg DIR DME ELT ETI EXT F/O FAA FF FLT FMC FWD GRD HF ILS in IRU kg lb LRU mc

Audio Accessory Unit Aircraft Communication Addressing & Reporting System Automatic Direction Finder Address Amplitude Modulation Amplifier Antenna Auxiliary Power Unit Auxiliary Braid Celsius Center Drive Unit Clear Communication Column Timer D ecoder Center Contour Cockpit Voice Recorder Direct Current Degree Direct, Direction Distance Measuring Equipment Emergency Locator Transmitter Elapsed Time Indicator External First Officer Federal Aviation Administration Fast Forward Flight Flight Management Computer Forward Ground High Frequency Instrument Landing System Inch Inertial Reference Unit Kilogram Pound Line Replaceable Unit Centimeter

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MHz MIC MSTR mW NLG OBS OVHD PCM PCP PCU PES PRI PROV PSS PSU PSU PSUD PTT PWR R/T REW SEB SEC SEC SP SSB STBY UHF ULB V VDU VHF VOR VRMS VSCU VSWR VTR

Megahertz Microphone Master Milliwatt Nose Landing Gear Omni Bearing Selector Overhead Pulse Code Modulation Pilot’s Call Panel Passenger Control Unit Passenger Entertainment System Primary Language Pre-Recorded tape announcements Passenger Service System Power Controller Unit Passenger Service Unit Passenger Service Unit Decoder Push To Test Power Radio Transmit Rewind Seat Electronics Box Spoiler Elevator Computer Secondary Special Play Single Stroke Chime Standby Ultra High Frequency Underwater Locating Beacon Volt Video Distribution Units Very High Frequency Very High Frequency Omnibearing Range Volt Root Mean Square Video System Control Unit Voltage Standing Wave Ratio Video Tape Reproducers

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1. FLIGHT INTERPHONE SYSTEM. 1.1. General. The flight interphone system provides communications between flight crew members and between the flight crew and ground crew. Interface with the following systems is also provided : - The voice recorder, - Cabin interphone, - Cabin and service interphone system, - Communication transceivers, - Navigation receivers, - Passenger address system. During flight, a flight crew member may establish or monitor communications by using microphones and/or listening devices, in the following manner : - With a ground station or another airplane through the audio selector panel and a selected radio system. - With other flight crew members through the audio accessory unit and audio selector panels using INTPH position. - Monitoring navigation systems through the audio selector panel. - With passengers using the audio selector panel. On the ground, the flight interphone system may be used for communications between the flight crew and the sound service personnel at the nose landing gear, through the APU remote control panel. The flight interphone system also interfaces with the voice recorder to provide voice inputs from the captain, first officer, and first observer through the audio selector panel.

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FLIGHT INTERPHONE SYSTEM

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2. CABIN INTERPHONE. 2.1. General. The cabin interphone system provides communication between : - Cabin attendants, - Cabin attendants and the flight crew, - Cabin attendants and the service crew. This system also provides a means of interfacing with the service interphone and passenger address systems. Single-digit, touch-tone calling from each handset and from the pilot’s call panel is provided to direct calls to specific stations. Handsets are located at all cabin attendant stations and the pilot’s aft aisle stand. (Pilot’s handset is a customer option). When a cabin location is called from one of the cabin interphone handsets or the pilot’s call panel, a pink call light and a high/low chime are activated at the called station. When the flight compartment is called from a cabin handset, a blue location indicator light is activated on the pilot’s call panel and a high chime is generated.

The passenger address (PA) system may be accessed by handset calling. If the cabin interphone system fails, the calling system will automatically switch the handset to the PA system. Priority for the PA system is automatically established as follows : - Flight crew announcements, - Attendant announcements, - Pre-recorded tape announcements (PROV) and audio from the video system, - Boarding music. Voice conversations among attendants and flight crew are held between specific stations or as a party-line, since common amplifiers are utilized. Voice communication is provided through the pilot’s handset (when installed), audio selector panels, and attendants’ handsets. The circuits are voice actuated; therefore, one may not hear background noise on a handset until speech or other signal input exceeds the squelch limits.

When an ALERT call is made from any handset, the pink lights at all attendants’ stations will flash continuously at one-second intervals. At the same time, the high/low chimes will be repeated three times. The pink lights at each station will cease flashing as that station’s handset is taken off the hook. In the flight compartment, an ALERT call will turn on the blue ALERT call light and sound a single high chime.

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3. SERVICE INTERPHONE. 3.1. General. Purpose. The service interphone system provides the means for communications between various service interphone jacks, between these jacks and the attendant handsets, and between the jacks and the flight crew audio selector panels. System Description. Power is supplied from the 28v dc battery bus through the CAB/SERVICE circuit breaker on the P11 panel. Interior jacks are connected together through mixing circuits and amplifiers in the audio accessory unit. Exterior jacks are connected through the same circuits and an on/off switch on the P61 panel. The flight crew can communicate with the service interphone stations by pressing the appropriate microphone and listen switches on their audio selector panels, and pushing the interphone tie switch on the pilot’s call panel. The cabin attendants can communicate with the service interphone stations by picking up their handsets and talking.

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4. CREW CALL. 4.1. General. Purpose. The ground crew call system provides the alerts required to initiate communication between ground crew personnel and flight deck personnel. This system is also used to alert ground personnel in case of critical equipment cooling and power failures. System Major Components. The ground crew call system is made up of the following major units : - The flight deck call switch on the APU remote control panel P40. - The pilots’ call panel on P5. - The ground call horn in the nose wheel well.

Ground-to-Flight Compartment Call Features. Pressing the FLIGHT DECK CALL switch on the nose wheel well area sounds a single high chime and illuminates a blue GND CALL light on the pilots’ call panel for 30 seconds. Equipment Cooling/Power Loss Warning. The ground crew call horn in the nose wheel well area sounds a warning for the following conditions : - Equipment cooling system’s low airflow or overheat sensors are activated. - The R, L, or C inertial reference system is operating on the hot battery dc bus while the airplane’s ac power is off.

System Interfaces. The system receives cooling and power failure information from the equipment and cooling indicator card located in the electrical system card file (P50). The system outputs a chime-initiate signal to the chime generator, located in the bell chime unit P51, and horn on voltage to the horn located inside the nose wheel well. Flight Compartment-to-Ground Call Features. Pressing the GND CALL switch on the pilots’ call panel sounds a loud horn in the nose wheel well area as long as the switch is pressed.

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5. PASSENGER ADDRESS SYSTEM - GENERAL.

Purpose. The passenger address system allows the flight crew and flight attendants to make announcements to the passengers. Speakers in the passenger compartment broadcast audio throughout the passenger and attendant areas. System Description. Audio inputs into the system can be announcements from the pilots, purser or attendants. Entertainment audio can be boarding music or audio from the video system. Discrete inputs enable chimes inside the amplifier to generate tones to alert passengers and attendants to changes in no smoking and seat belt signs or to cabin interphone system alerts. Other discrete inputs automatically control system gain to increase passenger address volume if an engine is operating or the cabin oxygen system is deployed. The audio output from the passenger address amplifier is routed to speakers in the passenger service units, lavatories, and to attendant speakers in the galleys and attendant stations. The audio output also goes to the listen switches in the audio selector panels for passenger address sidetone returning to the flight interphone system. The amplifier has a test switch to allow system testing.

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P.A. INPUT 3 OPTION

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PASSENGER ADDRESS SYSTEM

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6. VHF COMMUNICATION SYSTEM. 6.1. General. A VHF communications system consists of : - A control panel, - A transceiver, - An antenna, and - The associated wiring. The control panel provides frequency selection and status data on an ARINC 429 bus. The flight interphone system provides the PTT control line and microphone audio input for voice transmission. When operated in conjunction with ACARS (provision), the ACARS mangement unit supplies frequency selection data, downlink data tones, mode selection and data transmission keying to the transceiver. The transmitted and received rf signals travel to and from the antenna on a coaxial line. Receiver audio is routed out of the flight interphone system for voice communications, to the SELCAL decoder for SELCAL signalling and to the ACARS management unit for data message tone interpretation. A key event discrete is sent to the flight recorder for recording, to the pilot’s call panel to reset the SELCAL lamp and decoder and to the flight management computer for use by software options.

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6.2. Component Description. 6.2.1. VHF Control Panel. Purpose. The control panel provides remote frequency selection for the associated transceiver. Frequency Selection Switches. There are two independent sets of frequency selection knobs (switches). They each select a frequency that can be sent to the transceiver.

Frequency Indicator Windows. The windows show the frequency that has been selected by the associated switches. The readout is a liquid crystal display (LCD). Frequency selection transfer (TFR FREQ SEL) switch. The TFR switch selects one of the two indicated frequencies to be used for tuning the transceiver. Active Display Lamps. The illuminated white dot lamp indicates which frequency selection is currently in control of the transceiver. Characteristics. Frequency Range

:

Channel Spacing Power Signal Output

: : :

118.00 thru 136.975 MHz (the 1 KHz digit is not shown in the window). 8.33 KHz. 28 Vdc. ARINC 429 digital data word.

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7. HF COMMUNICATION SYSTEM. 7.1. General. A system consists of a control panel, a transceiver, an antenna coupler and an antenna. Power on-off, frequency and mode selection are controlled from the control panel. The system receives microphone audio and key signals from the interphone system. The transceiver generates the rf signal to be transmitted or demodulates the received rf signals. The coupler automatically matches the antenna to the transceiver. Received audio (SSB or AM) is routed to the interphone system. Unsquelched AM audio is routed to the SELCAL system. Keying for transmission is recorded by the flight data recorder, sent to the SELCAL system for decoder reset, and sent to the FMC for crew alertness monitoring.

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7.2. Component Description. 7.2.1. HF Control Panel. General. The control panel provides remote control of the HF Communication system. The unit contains rotary frequency and mode selection switches, printed circuit boards with individual components, and CMOS logic circuitry that provides conversion of parallel BCD frequency information and discrete switch settings to serial ARINC 429 control data to the transceiver. It also provides hard-wired resistance value to the receiver rf sensitivity circuit. Mode Control Switch. The mode control switch enables selection of OFF, USB (upper sideband) or AM (amplitude modulation) modes. RF Sensitivity Control. The RF SENS potentiometer controls the receiver rf sensitivity. Frequency Selection Switches. The frequency selection switches enable selection of transceiver operating frequency as shown below : - Left large knob - Left small knob - Right large knob - Right small knob

: : : :

MHz selection 100 kHz selection 10 kHz selection 1 kHz selection

HF COM CONTROL PANEL

Characteristics. An electrical connector is located on rear of enclosure. Power requirements are 115 Vac, 400 Hz, one phase. The frequency range is from 2.0 through 29.999 MHz with 1 kHz increments. EFFECTIVITY ALL

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8. PES - GENERAL. Passenger Entertainment System (PES). The PES provides selectable recorded entertainment audio at each passenger seat location. This system provides a priority interrupt capability that enables a passenger address override to occur simultaneously on all audio channels. The tape reproducer provides 12 channels of audio, 10 channels directly to the main multiplexer and 2 channels directly to the forward zone multiplexer. The same 2 channels are sent to the mid and aft zone multiplexers through the zone driver. The main mux coverts the audio from analog into digital, multiplexes the 10 channels and outputs them serially to the zone multiplexers. The zone multiplexers convert the 2 channels of tape reproducer audio and 2 channels of video system audio from analog into digital and multiplexes these channels with the 10 channels from the main mux. The combined signal is sent serially to each seat electronics box (SEB). The SEB demultiplexes the signal, converts the signal from digital to analog and supplies the audio to the passenger headset as selected by the passenger control unit (PCU). Passenger address announcements are input to the zone multiplexers and multiplexed onto all 14 channels.

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Passenger Service System. The PSS provides passenger control of the reading lights and an attendant call capability for passenger service at each seat location. The column timer decoder (CTD) serves as the interface unit between the SEB and the passenger service unit decoder (PSUD). It also has the clock that provides the timing for both the SEB’s and the PSUD’s. When a passenger pushes a reading light on or off switch or an attendant call switch, a signal is sent from the PCU to the SEB to the CTD. The CTD turns on the master attendant call light and through the PSUD the row call light or reading lights. It also triggers the electronic chimes.

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9. PASSENGER ENTERTAINMENT SYSTEM. Main Multiplexer. The tape reproducer supplies ten monophonic tracks of analog audio to the main multiplexer. This input audio is converted to digital form, multiplexed, and sent to the forward zone multiplexer serially. These ten channels of audio are sent back out of the forward zone multiplexer to the mid zone multiplexer, and then back out of the mid zone multiplexer to the aft zone multiplexer. Part of the audio to the main multiplexer may be in stereo form. In this case, one monophonic track from the tape reproducer will be programmed as the left channel of a stereo pair, while another normally monophonic track will be programmed as the right channel. Switches within the main multiplexer provide this programming flexibility.

Seat Electronics Box. Fourteen channels of audio are sent from the forward, mid, and aft zone multiplexers to three columns of seat electronics boxes. Here the channels of digitized audio are converted back to analog form. The audio is then amplified and sent to the audio transducer and headset jack in the passenger control unit (PCU) as selected by the channel select switch. Passenger Control Unit. A passenger listens to the audio by inserting an acoustic headset into the transducer’s openings or an electrical headset into the headset jacks. The passenger may change audio program channels by selecting them through the channel select control of the PCU. The audio level is controlled by the volume controls in the PCU.

Zone Multiplexers. Ten channels (tracks) of digitized audio from the main multiplexer are processed with other audio inputs in the forward, mid and aft zone multiplexers. They are multiplexed with the remaining tape reproducer tracks and two audio inputs from the video system control unit. PA audio, when present, replaces all other input audio. A 50 ohm termination plug on the aft zone multiplexer terminates the multiplexer-to-multiplexer audio lines.

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10. PASSENGER SERVICE SYSTEM. 10.1. PSS Block Diagram. General. The passenger service system is made up of three zones : forward, mid and aft. Each zone has a column timer decoder (CTD), passenger service unit decoders (PSUD), seat electronics boxes (SEB), passenger control units (PCU), master call lights and electronic chime units. There is one attendant panel, with a test switch, at the left forward attendant station for the entire airplane. Each zone has right, center, and left columns with the seats connected from forward to aft in each column. Each CTD has three identical circuits to control its respective columns. Forward Attendant’s Panel. The READING switch gives the attendant control of all reading lights in the airplane. They can be all on (for a reading light check or cabin cleaning), all off or in NORMAL position (under the control of each passenger). The PASS ENT & SERVICE SYS switch allows the attendant to test both the PES and PSS for the entire airplane. It supplies various combinations of open and ground inputs to the CTD’s depending on the switch position. It also applies 28 Vdc to the main multiplexer in MASTER TEST and ENT TEST positions. Each zone, forward and aft, has a separate MASTER CALL RESET switch/light. The FWD MSTR CALL RESET light combines indications for the forward and mid entertainment zones. The light will illuminate from a passed test in the respective zone. Pressing the MSTR CALL RESET switch will cause the corresponding zone master call lights and PSUD attendant (row) call lights to extinguish.

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Operation. Each CTD acts as the interface unit between corresponding columns of PSUD’s and SEB’s. A termination plug is connected to the last PSUD and SEB in each column. Each PSUD controls reading lights (one per passenger seat) and an attendant call (row call) light (one per seat group). Each SEB receives inputs from two, three or four PCU’s. The center columns may have three or four PCU’s, but the outboard columns have only two. Each zone has blue master call lights for both the left side and the right side of the zone. Chime outputs provide input to the associated electronic chime unit to alert the attendant to passenger calls. Attendant Call Function. Each passenger calls an attendant by pushing the attendant call button on their passenger control unit. This causes the PSUD row call light and the appropriate master call light to come on. The lights may be turned off by pushing the PCU reset switch (cancelling the call) or pushing the appropriate MASTER CALL RESET switch on the forward attendant’s panel.

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ENTERTAINMENT Section. Switches in this section control PES/PSS power and boarding music. - The BRD MUSIC VOLUME knob adjusts the volume level of the boarding music. - The CHANNEL SELECT knob selects the boarding music channel to be played. - The PASS ENT SYST PWR switch controls power application to the PES components. To use the PES, the PSS must also be on.


CALL & SERVICE Section. Switches in this section control the PSS power, reset the passenger call lights, and control the main entry door. - The PASS SERV SYST PWR switch controls power application to the PSS components. The PES does not have to be on. - The FWD MSTR CALL RESET switch/light turns on when a passenger-toattendant call is made. Pressing the light resets passenger (row) call and master call lights in both the forward and mid cabin areas. The light is also used to indicate results of PES/PSS testing. - The AFT MSTR CALL RESET switch/light works the same as the FWD MSTR CALL RESET switch/light, but for the aft cabin area. - The MAIN DOOR UP and DOWN switches opens and closes the left forward entry door.

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11. PES VIDEO SYSTEM - GENERAL. The passenger entertainment system (PES) video provides large screen projected video for general passenger viewing in-flight. This system is capable of providing audio and video signals derived from tape cassettes or external TV broadcasts. Basically, the system consists of the following components : - TV antenna system, - Video antenna coupler, - Video tape reproducers (2), - TV tuner, - Video system control unit, - Video projector and associated viewing screen (5), - Video distribution units (5). The audio signals from the video tape reproducers or tuner can be distributed through the PA system to overhead speakers and through the passenger entertainment system (audio) to the passengers’ individual headsets.

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12. VOICE RECORDER - GENERAL. The system consists of a control panel with an area microphone and a solid state memory recorder.

All audio output signals from the captain’s, first officer’s and observer’s (FIRST OBS) audio selector panels are routed directly to the recorder.

The control panel area microphone picks up flight compartment ambient sounds such as voices and alerts. Engine noise frequencies are reduced by filtering.

An underwater locating beacon is attached to the front panel of the recorder. It activates automatically when it is immersed in water.

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12.1. Component Description. 12.1.1. Voice Recorder Control Panel. Purpose. The purpose of the voice recorder control panel is to provide the means to pick up ambient flight compartment sounds, monitor recordings, bulk erase the recordings and test the system. Area Microphone. The area microphone is a condenser-type wide frequency range (150-5000 Hz) model mounted in the control panel. It provides essentially a full pickup of the flight compartment ambient sound. The microphone signal is pre-amplified in the control panel and routed to the recorder. Erase Switch. The erase switch activates the bulk erase feature. The switch is connected in series with the parking brake and air/ground relays to prevent erasure while airplane is in flight or in motion on the ground. Headset Jack. The headphone jack provides the capability to monitor the audio being recorded. Test Meter. The test meter provides an indication when the recorded test signals are of sufficient strength, indicating successful test signal recording. Test Switch. The test switch provides the means to activate the test signals.

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12.1.2. Underwater Locating Beacon. Purpose. The underwater locating beacon (ULB) is an ultrasonic beacon. It makes a watersubmerged recorder easier to find. Operation. The ULB activates when it is submerged in water. It will operate to maximum depth of 20,000 feet. It has a maximum detection range of approximately 10,000 feet. Its operating life is 30 days. The ULB transmits an acoustic pulse of 37.5 kHz at a rate of one-pulsepersecond. ULB Battery Replacement. Depending on the shelf life of the ULB battery used, the battery must periodically be replace. A replacement date label is on the body of the ULB to show ULB replacement date, or ULB battery replacement date, depending upon ULB model. Periodically, maintenance personnel will replace either the battery, or the whole ULB, depending upon ULB model number.

ULB Maintenance. ULB model DK100 maintenance. The DK100 ULB uses a lithium battery. It has an operating life (not activated) of six years. No battery maintenance is required. Keep the water switch contacts clean. CAUTION : DO NOT DISASSEMBLE THE ULB. WARNING : NO BATTERY MAINTENANCE IS REQUIRED FOR THE DR100 ULB. DO NOT REMOVE BATTERY AT ANY TIME. AVOID CRUSHING OR PENERTRATING ULB CASE. DO NOT DISPOSE OF ULB. AT OR NEAR EXPIRATION DAT PRINTED ON CASE, RETURN ULB TO MANUFACTURER FOR SERVICE. FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT IN RELEASE OF HAZARDOUS CHEMICALS.

Acoustic Beacon Model DK100 (DUKANE CORPORATION) requires no battery maintenance. At or near the experation date printed on the case it is replaced and sent to the manufacture for service. Acoustic Beacon Model N15F2108 (DUKANE CORPORATION) requires periodic replacement of its battery by the date on the replacement date label. Always re-install the new ULB on the recorder so that the replacement date label is readable from the front of the recorder.

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13. ELT - INTRODUCTION 13.1. Purpose The emergency locator transmitter (ELT) system automatically sends emergency signals when it senses a large change in the airplane velocity. The ELT sends homing signals to search and rescue crews on the VHF and UHF emergency channels (121.5 MHz and 243.0 MHz). The ELT also sends emergency signals to satellite receivers. The satellite receivers send this information to ground stations to calculate the location of the distress signals. This signal also position coordinates and airplane identification data.

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13.2. General Description The emergency locator transmitter (ELT) system has these components: - Control panel - ELT transmitter - Antenna. The control panel is used to manually start the ELT transmitter or to do a test of the ELT. It also has a light to tell you that the ELT transmitter is in operation. An EICAS level C message also notifies the crew when the ELT transmitter is on. The ELT transmitter has two transmitter sections. One transmitter sends a swept tone on the VHF and UHF emergency channels (121.5/243.0 MHz). The other transmitter sends digital data every 50 seconds on the 406 MHz channel. The antenna sends 121.5/243.0 MHz and 406 MHz transmit signals.

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B767 200-300 BOOK 23 101 - Communications

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