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cruise, or descent.
Autothrottle DISCONNECT switch. . . . . . . . . . . . . . . . . PUSH
[Allows thrust levers to remain where manually positioned.]
Thrust levers (Both). . . . . . . . . . . . . . . Retard to MID position
[Prevents exceeding thrust limits when switching to alternate mode.]
EEC MODE switches (Both). . . . . . . . . . . . . . . . . . . . . . . .OFF
Push one switch at a time.
[Ensures both engines operate in alternate mode.]
Thrust levers (Both). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Set
[Maintains desired airspeed and rate of climb or descent.]
Note: Maximum thrust limiting is not available in alternate
mode. Alternate thrust setting information is
displayed on the N1 indications.
If TAT remains constant and near 0 degrees C:
Airplane TAT probe icing is suspected:
• Reference/Target N1 and Reference N1 may be
temporarily unreliable
• Observe EGT caution limits
• Maximum N1 may be temporarily unreliable.
Continued on next page
U TAT PROBE ICING
December 15, 2006
787 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D615Z003 Boeing Proprietary 0.27
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Continued from previous page
If TAT remains constant and near 0 degrees C: (continued)
Do not accomplish the following checklists:
ENG LIMIT PROT L
ENG LIMIT PROT R
If TAT is not near 0 degrees C:
Engine TAT probe icing is suspected:
• Airplane TAT is reliable
• Reference/Target N1 and Reference N1 are reliable if
displayed
• Maximum N1 is reliable if displayed.
Autothrottle may be re-engaged when:
• Reference/Target N1 and Reference N1 are displayed
• TAT is not near 0 degrees C.
Do not accomplish the following checklists:
ENG EEC MODE L
ENG EEC MODE R
December 15, 2006
787 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D615Z003 Boeing Proprietary
28
0.28
Condition: Static discharge around the windshield, bright glow in
the engine inlets, smoke or dust on the flight deck, or
acrid odor indicates the airplane is in volcanic ash.
Exit volcanic ash as quickly as possible. Consider a 180
degree turn.
Oxygen masks and smoke goggles
(If required). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . On
Crew communications (If required). . . . . . . . . . . . . Establish
Autothrottle DISCONNECT switch. . . . . . . . . . . . . . . . . PUSH
[Allows thrust levers to remain where manually positioned.]
Thrust levers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Close
Conditions permitting, operate engines at idle.
[Reduces possible engine damage and/or flameout by decreasing EGT.]
ENGINE ANTI–ICE selectors (Both). . . . . . . . . . . . . . . . . . .ON
[Increases bleed air extraction to improve engine stall margin.]
Recirculation FANS switches (Both). . . . . . . . . . . . . . . . .OFF
[Increases bleed air extraction to improve engine stall margin by putting
packs into high flow.]
APU selector
(If APU available). . . . . . . . . . . . . . . . . . . . . . .START, then ON
[Provides an electrical power source in the event one or both engines flame
out.]
Note: Volcanic ash can cause non–normal system reactions
such as:
• engine malfunctions, increasing EGT, engine stall
or flameout
• decrease or loss of airspeed indications
• EQUIP COOLING OVRD indications
• FIRE CARGO FWD or AFT indications.
Continued on next page
U VOLCANIC ASH
December 15, 2006
787 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D615Z003 Boeing Proprietary 0.29
0.29
Continued from previous page
If engines flamed out or stalled, or EGT rapidly approaching
or exceeding limit:
FUEL CONTROL switches
(Both). . . . . . . . . . . . . . . . . . . . . . . . . . . CUTOFF, then RUN
[Attempts to clear stall condition and allows engines to be put into start
mode.]
RAM AIR TURBINE switch. . . . . . . . . . . . . . . . . . . . . PUSH
Push and hold for 1 second.
[Backs up automatic deployment of the RAT.]
For a dual engine in-flight start, do not manually abort the
start if EGT indication 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.
Airspeed. . . . . . . . . . . . . . . . . . . . . . . . . . Above (TBD) KTS
[Ensures best windmill start capability.]
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