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1 Forward Equipment Cooling (EQUIP COOLING FWD ) Switch
OVERHEAD PANEL
VENTILATION
NORM
ALTN
ON
FAULT
ON
FAULT
AUTO
OFF
L PACK R PACK
AUTO
OFF
CABIN
TEMP
AIR COND
RESET
TEMP
FLT DECK
RECIRC FANS
ON
LOWER
ON
UPPER
EQUIP COOLING
AFT
AUTO
OVRD
FWD
AUTO
OVRD
AIR CONDITIONING
TRIM AIR
C W CW
L R
3
2
1
5
6
9
7
8
PRELIMINARY
4
787 Flight Crew Operations Manual
Air Systems -
Controls and Indicators
2.10.2 Boeing Proprietary
Off (AUTO not visible) –
• both forward equipment cooling supply fans, flight deck supply fan and
vent fan are commanded off
• both the smoke/override valve and the flight deck isolation valve are
commanded open
• forward cargo heat (or forward cargo air conditioning if installed)
becomes inoperative
• OVRD illuminates.
OVRD (illuminated amber) – SMOKE/OVRD mode is operating because:
• off is selected manually
• both forward equipment cooling supply fans fail, or
• the smoke/override mode is automatically selected by the smoke detection
system.
• selects the target flight deck temperature
• turning the control toward C or W sets the desired temperature between
18 degrees C and 29 degrees C. Mid position (12 o’clock) sets
approximately 24 degrees C.
AUTO – the pack is automatically controlled.
Off (AUTO not visible) – cabin air compressors are commanded off.
OFF illuminated (amber) – both associated cabin air compressors are not running:
• automatically during engine start
• automatically due to a pack or compressor outlet high temperature, or
• OFF is manually selected.
ON – the trim air valve is commanded open.
Off (ON not visible) –
• the trim air valve is commanded closed, and
• FAULT illuminates.
FAULT illuminated (amber) –
• the trim air valve is failed closed
• the trim air valve is commanded closed because of a zone supply duct
overheat, or
• the TRIM AIR switch is selected off.
2 Flight Deck Temperature (FLT DECK TEMP) Control
3 PACK Switches
4 TRIM AIR Switches
787 Flight Crew Operations Manual
Air Systems -
Controls and Indicators
Boeing Proprietary 2.10.3
Push –
• Resets any latched air conditioning faults and attempts to restart normal
operation
• resets any trim air valves held closed due to overheat, control failure, or
valve failure
• attempts to reset a failed recirculation fan
• resets fault protection.
Provides automatic passenger cabin temperature control.
Turning the control toward C or W sets the passenger cabin master reference
temperature between 18 degrees C and 29 degrees C.
ON – provides automatic operation of the associated recirculation fans.
Off (ON not visible) – the selected recirculation fans do not operate.
EICAS advisory message will be displayed if either the upper or lower switches
are placed in the off position.
NORM – environmental control system is configured for normal operation
ALTN (illuminated amber) - alternate ventilation valve is in the open position.
When valve is open, no alternate ventilation flow occurs when airplane is
pressurized normally.
AUTO – aft equipment cooling mode is controlled automatically.
Off (AUTO not visible) –
• both aft equipment cooling supply fans and vent fan are commanded off
• override valve is commanded open
• aft cargo heat becomes inoperative
• OVRD illuminates.
OVRD (illuminated amber) – SMOKE/OVRD mode is operating because:
• off is selected manually
• both equipment cooling supply fans fail, or
• smoke/override mode is automatically selected by the smoke detection
system.
5 Air Conditioning Reset (AIR COND RESET) Switch
6 Cabin Temperature (CABIN TEMP) Control
7 Recirculation Fans (RECIRC FANS) Switches
8 Alternate Ventilation (VENTILATION) Switch
9 Aft Equipment Cooling (EQUIP COOLING AFT) Switch
787 Flight Crew Operations Manual
Air Systems -
Controls and Indicators
2.10.4 Boeing Proprietary
Shoulder and Foot Heaters
LOW – electric heater operates on low setting.
Turn – the electric heater adds heat to the conditioned air flowing in at shoulder
level at variable temperature settings up to HIGH.
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787机组操作手册Flight Crew Operations Manual 1(123)
