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D. If Thrust Reverser does not restow (Warning message and
lights illuminated), land as soon as possible. Land using
maximum of 20° flaps if T/R doors are actually deployed.
E. If actuating the T / REV EMER STOW switch causes the
opposite REV UNLOCK light to illuminate, deselect the T /
REV EMER STOW switch and land as soon as practical.
If unable to stow the reverser, leave affected engine in idle.
Anticipate a higher drag condition with a deployed reverser
and land as soon as practical. Do not extend flaps beyond 20°
during landing to avoid increase in idle RPM with resultant
increase in reverse thrust. When landing with 20° of flaps,
select the Ground Spoiler Flap Override switch to ON to
ensure automatic deployment of ground spoilers on
touchdown.
Continued on next page →
Quick Reference Handbook
REVISION 8 ABNORMAL / EMERGENCY PROCEDURES
Oct 11/02 Page EC - 13
Reverse Thrust Unlock or Deploy, ctd… AFM 4-24-10
CAUTION: IN ANY SITUATION WHERE REVERSER WILL NOT
RESTOW, AFFECTED ENGINE SHOULD BE SHUT DOWN ONLY IF
REQUIRED TO MAINTAIN LEVEL FLIGHT. UNDER CERTAIN GROSS
WEIGHT AND ATMOSPHERIC CONDITIONS, SUCCESSFUL GOAROUND
MAY NOT BE POSSIBLE.
NOTE: For thrust reversers unlocked prior to engine start, see the Thrust
Reverser Locking Procedure that follows this procedure.
3. If the REV UNLOCK light illuminates on the ground:
CAUTION: DO NOT ATTEMPT TO DEPLOY OR RESTOW THE
AFFECTED REVERSER. DAMAGE CAN OCCUR TO AN
ACTUATOR’S PRIMARY LOCK IF IT IS UNLOCKED WITHOUT
MAINTAINING STOW SIDE PRESSURE ABOVE 1200 PSI. THE
ACTUATOR COULD BE DAMAGED REQUIRING REPLACEMENT
AND/OR LOCKDOWN PROCEDURES MORE RESTRICTIVE THAN
THE INITIAL FAILURE WOULD DICTATE.
A. Return for maintenance action prior to takeoff.
END
Thrust Reverser Locking Procedure AFM 3-24-20
NOTE: Utilize this procedure when a T/R is inadvertently deployed during
engine shutdown. If a malfunction is suspected, refer to GIV Maintenance
Manual, Chapter 78, for T/R lockdown information.
1. For left T/R unlock, open WARN LTS PWR # 4 CB (P, F-4); For
right T/R unlock, open WARN LTS PWR # 8 CB (P, G-3 or G-4).
Affected T/R unlock light should extinguish.
CAUTION: OBSERVE STARTER DUTY CYCLE.
CAUTION: DO NOT ATTEMPT TO START ENGINE IF T/R DOORS
ARE NOT ENGAGED BY THE SECONDARY LOCK LATCH. PERFORM
NEXT STEP IF T/R DOORS ARE NOT ENGAGED.
2. With reverse thrust lever in stow position, perform Engine
Cranking Cycle, page NG-1. T/R doors will engage secondary
lock latch.
NOTE: Engine crank cycle will not lock T/R actuator.
3. With reverse thrust lever in stow position, perform normal engine
start (Engine Starting, page NC-1.)
Continued on next page →
Quick Reference Handbook
ABNORMAL / EMERGENCY PROCEDURES REVISION 8
Page EC - 14 Oct 11/02
Thrust Reverser Locking Procedure, ctd… AFM 3-24-20
4. Close circuit breaker(s) after engine reaches idle. T/R unlock and
deploy lights should be extinguished.
NOTE: As an alternate method to the engine crank cycle, the T/R doors
may be brought through secondary lock latch as follows:
1. Remove electrical and hydraulic power from airplane.
2. Cycle all flight controls to remove residual hydraulic pressure from
systems.
3. Apply hand pressure to lower door until secondary lock latch engages
T/R doors.
END
Engine Synchronizer Failure AFM 3-08-10
Failure of the engine synchronizer will be evident by left engine failing
to maintain synchronization with the right on either low pressure or
high pressure speed. Should this occur, select the synchronizer OFF.
The synchronizer has also failed if, when selecting the system OFF,
the operating light fails to extinguish after fifteen (15) seconds. Should
this occur, pull the ENG SYNC circuit breaker (P, K-9). If the synchronizer
has failed, power lever stagger and asymmetric reverse thrust
may be expected but should not present control problems. With the
synchronizer in the failed mode, the approach idle system will not limit
the engine to minimum approach RPM of 67 % HP RPM. This RPM
must be monitored on approach.
On SN 1214 and subsequent and airplanes with drawing
1159SB40761/1159SB40762 incorporated, the engine synchronizer
function is controlled by the autothrottle. The engine synchronizer
function is only available when the autothrottle is engaged and in the
speed control mode, e.g., CRUISE, V/S mode, V PATH mode, or
PITCH HOLD mode. The engine synchronizer function is enabled with
the autothrottle engaged by using the ON/OFF and LP/HP selector
switches on the overhead panel.
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