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flameout, or both, by decreasing EGT.
December 10, 2007
777 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D632W001-TBC
7.70
7.70
10 Choose one:
11 FUEL CONTROL switches
(both) . . . . . . . . . . . . . . . . . . CUTOFF, then RUN
12 RAM AIR TURBINE switch . . . . . . . . . . Push and
hold for 1 second
13 For a dual engine in-flight start, do not manually
abort the start if the EGT display turns red.
Autostart allows EGT to exceed the in-flight start
limit, however autostart aborts the start before
EGT becomes too high for continued engine
operation.
14 Set airspeed above 270 knots.
Continued on next page
Volcanic Ash continued
Notes:Volcanic ash can cause non–normal system
reactions such as:
•Engine malfunctions, increasing EGT,
engine stall or flameout
•Decrease or loss of airspeed displays
•EQUIP COOLING OVRD message
•FIRE CARGO FWD or AFT messages
Engines run normally:
Plan to land at the nearest suitable airport
Engines are flamed out or stalled, or EGT is
rapidly approaching or exceeding the limit:
Go to step 11
December 10, 2007
777 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D632W001-TBC 7.71
7.71
15 Engines may accelerate to idle very slowly,
especially at high altitudes. The time from fuel
control switch to RUN to stabilized idle may be as
long as two and a half minutes.
16 Slow acceleration may be incorrectly interpreted as
a hung start or engine malfunction. If N2 is steadily
increasing and EGT remains within limits, the start
is progressing normally.
17 When the HEAT PITOT L+C+R message blanks:
PRIMARY FLIGHT COMPUTERS
disconnect switch . . . . . . . . . . . . . . . . . DISC,
then AUTO
This restores flight control normal mode.
The autopilot can be re–engaged when flight
control normal mode is restored.
18 Plan to land at the nearest suitable airport.
Volcanic Ash continued
December 10, 2007
777 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D632W001-TBC
7.72
7.72
[PW Engines]
1 Exit volcanic ash as quickly as possible. Consider a
180 degree turn.
2 Don oxygen masks and smoke goggles, if needed.
3 Establish crew communications, if needed.
4 Autothrottle disconnect switch . . . . . . . . . . Push
6 ENGINE ANTI–ICE selectors (both) . . . . . . . . .ON
7 WING ANTI–ICE selector . . . . . . . . . . . . . . . .ON
8 RECIRC FANS switches (both) . . . . . . . . . . . .Off
9 APU selector
(if APU available) . . . . . . . . . . . . START, then ON
Continued on next page
Volcanic Ash
Condition: Volcanic ash is suspected when one or more
of these occur:
•A static discharge around the windshield
•A bright glow in the engine inlets
•Smoke or dust on the flight deck
•An acrid odor
Objective: Exit the ash cloud and restart engines if
needed.
If conditions allow, run the engines at idle.
5 Thrust levers (both). . . . . . . . . . . . . . . . . Idle
This reduces possible engine damage or
flameout, or both, by decreasing EGT.
December 10, 2007
777 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D632W001-TBC 7.73
7.73
10 Choose one:
11 FUEL CONTROL switches
(both) . . . . . . . . . . . . . . . . . . CUTOFF, then RUN
12 RAM AIR TURBINE switch . . . . . . . . . . Push and
hold for 1 second
13 Set airspeed above 240 knots.
14 Engines may accelerate to idle very slowly,
especially at high altitudes.
15 Slow acceleration may be incorrectly interpreted as
a hung start or engine malfunction. If N2 is steadily
increasing and EGT remains within limits, the start
is progressing normally.
Continued on next page
Volcanic Ash continued
Notes:Volcanic ash can cause non–normal system
reactions such as:
•Engine malfunctions, increasing EGT,
engine stall or flameout
•Decrease or loss of airspeed displays
•EQUIP COOLING OVRD message
•FIRE CARGO FWD or AFT messages
Engines run normally:
Plan to land at the nearest suitable airport
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波音777快速检查单 Quick Reference Handbook QRH(40)
