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PSP 604-15
POWER PLANT
MALFUNCTIONS
APR INOP
APR INOP
N1 amplifier failure is suspected:
Yes
At a safe altitude:
(1) Both thrust levers...................................................RETARD
to below 79% N2.
(2) Both ENG SPEED ........................................................ OFF
(3) APR .............................................................................. OFF
NOTE
Use APR-off performance. Refer to Airplane Flight
Manual, Chapter 6; PERFORMANCE.
(4) Thrust levers....................................................... ADVANCE
as required.
NOTE
Thrust lever controls are more sensitive to changes.
− END −
No
(1) No further action required.
END
APR CMD SET
APR CMD SET
On ground:
Yes
(1) Do not take off.
− END −
No
In flight:
(1) Thrust levers...................................................................ADJUST
to within normal range.
(2) APR...................................................................................... OFF
(3) Engine performance ....................................................MONITOR
during approach.
END
ABNORM 1-9
REV 75, Feb 17/09
QUICK REFERENCE HANDBOOK
PSP 604-15
POWER PLANT
MALFUNCTIONS
Uncommanded Deceleration or Abnormal Engine
Oscillation/Fluctuation
........ Engine thrust does not agree with thrust lever selection.
NOTE
To prevent engine overspeed when selecting ENG SPEED
switches OFF, N2 indications should be referenced instead
of N1.
(1) Affected thrust lever .......................................................ADJUST
to below 79% N2 or IDLE (whichever occurs first).
(2) Affected ENG SPEED .......................................................... OFF
(3) Affected thrust lever ................................................... ADVANCE
CAUTION
Do not change power settings abruptly as engine response is
degraded.
(4) Affected engine ...........................................................MONITOR
Engine responds:
Yes
NOTE
1. To minimize asymmetric thrust, both ENG
SPEED switches should be selected OFF
prior to approach and landing.
2. Exercise caution to prevent overspeed during
thrust reverser use, when operating with
ENG SPEED switches OFF.
3. The APR system is inoperative when the
ENG SPEED switches are selected OFF.
− END −
No
(5) In-Flight Engine Failure/Shutdown .......................ACCOMPLISH
(See Page ABNORM 1–2)
END
ABNORM 1-10
REV 75, Feb 17/09
QUICK REFERENCE HANDBOOK
PSP 604-15
POWER PLANT
MALFUNCTIONS
N1 Fan Vibration
CAUTION
It is not recommended that an engine
be shut down unless there is another
indication of a severe engine
abnormality, i.e., high oil temperature,
high oil pressure, abnormal increase in
ITT, ITT exceedance, or abnormal
engine vibration is felt through the
airframe.
NOTE
1. If engine was started within 2 hours of shutdown,
allow 10 minutes for vibration levels to return to
normal.
2. An ITT increase of more than 10°C from stable,
matched N1 power is an abnormal increase.
Icing conditions:
Yes
(1) Affected thrust lever................................................ADJUST
N2 above 80% & N1 above 70%.
Do not exceed maximum continuous thrust setting.
Maintain thrust settings until vibration is reduced.
NOTE
1. Vibration may increase during the ice
shedding process.
2. Vibrations may momentarily indicate full
scale during the ice shedding process.
3. Thrust settings up to and including maximum
continuous may be required to shed ice.
(2) Engine indications ........................................ MONITOR ITT
No
(1) Affected thrust lever .......................................................ADJUST
to setting that maintains vibration level within normal
range.
(2) Engine .........................................................................MONITOR
ABNORM 1-11
REV 75, Feb 17/09
▼
QUICK REFERENCE HANDBOOK
PSP 604-15
POWER PLANT
MALFUNCTIONS
N1 Fan Vibration (Cont’d)
Vibration persists, and the condition indicates advisability of an
engine shutdown:
Yes
(3) In−Flight Engine
Failure/Shutdown..........................................ACCOMPLISH
(See Page ABNORM 1–2)
− END −
No
(3) No further action required.
END
ABNORM 1-12
REV 75, Feb 17/09
　
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