maximum motor speed (approximately 28% N2). 3) Stay at the minimum idle for a minimum of five minutes before you increase the speed to a higher power.
(b)
If you cannot start the engine in 15 minutes from the time of the engine shutdown: 1) Stop for a minimum of 50 minutes from the time of the
engine shutdown before you try to start the engine again. 2) After the 50-minutes, make sure the two rotors turn freely. 3) If the two rotors turn freely, do the Dry-Motor the Engine
procedure for approximately two minutes to permit the engine to become cool. 4) After you dry-motor the engine, permit the engine to become cool for five minutes before you motor the engine again. 5) After the five-minutes, do the steps that follow: a) Do the Dry-Motor the Engine procedure for two more minutes.
b) Try to start the engine again with the Start the Engine (Normal Operation) procedure and include the step that follows:
1. Put the FUEL CONTROL switch to the RUN position at
_ the maximum motor speed (approximately 28% N2). 6) Stay at the minimum idle rpm for a minimum of five minutes before you increase the speed to a higher power.
B. Operate the Engine at a Speed More Than Idle.
S 862-102-N00
CAUTION: DO NOT OPERATE THE ENGINE AT A SPEED MORE THAN MINIMUM IDLE
_______ WITH THE COWLING OPEN. IF THE COWLING IS OPEN AT A SPEED MORE THAN MINIMUM IDLE, THE FAN AIR CAN CAUSE DAMAGE TO EQUIPMENT.
(1) Operate the engine at a speed more than idle.
(a) Do the procedure for the Power Plant Operation Limits.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-00
ALL ú ú N03A Page 255 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(b) Let the engine become stable at minimum idle for five minutes.
CAUTION: DO NOT QUICKLY INCREASE OR QUICKLY DECREASE THE SPEED OF
_______ THE ENGINE. IF YOU DO NOT OBEY THIS INSTRUCTION, THE TURBINE BLADES CAN WEAR AND CAUSE THE PERFORMANCE OF THE ENGINE TO DECREASE.
(c) Move the forward thrust lever to the power level given in the maintenance procedure. 1) You must slowly and smoothly move the thrust levers when it
is possible. 2) Make sure the engine indications are less than the operation limits.
TASK 71-00-00-862-088-N00
9. Engine Shutdown (Normal) Procedure
__________________________________
A. Reference
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 36-00-00/201, Pneuamtic Systems
B.
Access
(1)
Location Zone
221 and 222 Control Cabin
412 Engine 1
422 Engine 2
432 Engine 3
442 Engine 4
C.
Procedure
S 712-093-N00
(1) Stop the engine (normal operation) with the steps that follow:
(a) Move the forward thrust lever rearward to operate the engine at minimum idle (Fig. 208).
CAUTION: DO NOT DO THE ENGINE SHUTDOWN BEFORE THE TEMPERATURE OF
_______ THE ENGINE DECREASES SUFFICIENTLY. IF YOU DO THE ENGINE SHUTDOWN TOO QUICKLY, YOU CAN CAUSE DAMAGE TO THE TURBINE WHEEL.
(b) Let the engine become cool for a minimum of five minutes at or near idle speed (you can include the taxi time as part of the five minute period).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-00
ALL ú ú N03A Page 256 ú Oct 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
CAUTION: DO NOT DO THE ENGINE SHUTDOWN UNLESS YOU SUPPLY PNEUMATIC
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 動力裝置 POWER PLANT 1(33)
