Descripción del sistema de combustible del B767-300
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Descripción del sistema electrico del B767-300
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BOEING 767 SYSTEMS REVIEW
Page 1
PRESSURIZATION
1.
GENERAL
¡ There are 2 separate modes of operation for pressurization : 1) AUTO : - with 2 identical independent systems provided for cabin pressure control (AUTO 1 & AUTO 2) - 1 system is selected & the other is prepared to accept control (1 AUTO INOP Ô switch automatically on the other + EICAS msg.) - If both AUTO INOP Ô AUTO INOP light Ô manual control to establish Ô - Auto controllers receive required inputs of cabin pressure, air/ground logic,barometric corrected altitude and thrust levers position. light remains ON 2) MANUAL : - uses DC power from the STBY DC Bus for direct positioning of the outflow valve ¡ Positive and negative pressure relief valves are also provided to protect the airplane against excessive pressure differentials
1. TAKEOFF ¡ When the thrust levers are advanced beyond 10°, the cabin altitude descends slowly below T/O altitude and permits a smooth pressure transition from ground to flight.
2. CLIMB ¡ Cabin rate prop. to the airplane rate up to 8.6 PSI, then climb schedule based on 8.6 PSI differential pressure reached at approximately 35000 ft. ¡ Index = 500 ft/min
3. CRUISE ¡ ¡ ¡ ¡ ¡
Cruise mode after 1 minute cruise Cabin altitude = the higher of the landing altitude and the 8.6 PSI differential cabin altitude If climb required, cabin climbs at 1/5 the selected auto rate. If descent required = auto rate setting No changes for altitude changes of 500 ft or less.
4. DESCENT ¡ Index = 300 ft/min ¡ After airplane descent of 1000 ft ¡ Descent to slightly below the preselected landing altitude (100 ft) or 8.6 PSI diff. Whichever is reached first. - if the preselected altitude is reached first, the cabin maintains that altitude until landing. - if the 8.6 PSI diff is reached first, the cabin follows the 8.6 PSI diff. Descent “schedule” to the preselected landing altitude.
5. LANDING ¡ Upon touchdown, the controller signals to OPEN the outflow valve ¡ After each landing = AUTO-TEST of the alternate controller
Copyright Smartcockpit.com Ludovic ANDRE / version 00
Smartcockpit.com
BOEING 767 SYSTEMS REVIEW
6. FAULTS AUTO INOP
- AUTO 1 + AUTO 2 cabin altitude functions INOP (amber)
or - MAN mode is selected
CABIN ALTITUDE
(red) : Cabin altitude above 10 000 ft + EICAS msg. (extinguishes when cabin altitude descends below 8500 ft). Ô if cabin climbs above 11.000 ft, valve is closed by an aneroid switch. Ô back to AUTO when the cabin is below 9.500 ft.
Copyright Smartcockpit.com Ludovic ANDRE / version 00
Page 2
Smartcockpit.com
BOEING 767 SYSTEMS REVIEW
CABIN ALTITUDE CONTROL
Copyright Smartcockpit.com Ludovic ANDRE / version 00
