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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
TASK 78-31-00-012-019-N00
3. Thrust Reverser Closing (Hand Pump Procedure)
_____________________________________________
A. General
(1)
You must not extend or lift the thrust reverser if more than six cascade vane segments are removed. You must install a minimum of three cascade vane segments in each thrust reverser half. The empty space between these three cascade vane segments must be equivalent. There must not be more than two adjacent empty spaces between the three cascade vane segments which are installed.
(2)
Hold each thrust reverser half in the open position with a minimum of two devices at all times. There are three devices that can hold the thrust reverser open: The hold-open rod, the cowl opening system (opening actuator), and the sling equipment.
B.
Special Tools and Equipment
(1)
A78019-21, Hand Pump-Thrust Reverser Opening
System
C.
References
(1)
AMM 27-62-00/201, Speed Brake Control System
(2)
AMM 27-81-00/201, Leading Edge Flap System
(3)
AMM 71-11-04/201, Fan Cowl Panels
(4)
AMM 71-11-06/201, Core Cowl Panels
D.
Access
(1)
Location Zones 415 and 416 Engine 1 - Thrust Reverser Halves 425 and 426 Engine 2 - Thrust Reverser Halves 435 and 436 Engine 3 - Thrust Reverser Halves 445 and 446 Engine 4 - Thrust Reverser Halves
(2)
Access Panels
413 and 414 Fan Cowl Panels - Engine 1
417 and 418 Core Cowl Panels - Engine 1
423 and 424 Fan Cowl Panels - Engine 2
427 and 428 Core Cowl Panels - Engine 2
433 and 434 Fan Cowl Panels - Engine 3
437 and 438 Core Cowl Panels - Engine 3
443 and 444 Fan Cowl Panels - Engine 4
447 and 448 Core Cowl Panels - Engine 4
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E. Prepare to Close the Thrust Reverser with the Hand Pump
(1) S 862-020-N00For safety, make sure the applicable airplane systems continue to be set in the deactivated configuration.
NOTE:____ The deactivated configuration for each applicable system can be found in this task: Prepare to Open the Thrust Reverser With the Hand Pump (which is at the start of the task before this one) (AMM 78-31-00/201).
F. Close the Thrust Reverser with the Hand Pump
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 012-021-N00
WARNING:_______ DO NOT MOVE BETWEEN THE ENGINE AND THE OPEN THRUST REVERSER
WHEN YOU CLOSE THE THRUST REVERSER. THE THRUST REVERSER IS
HEAVY AND CAN FALL CLOSED QUICKLY IF THE HAND PUMP OR ITS
HYDRAULIC SYSTEM HAS A FAILURE. THIS CAN CAUSE INJURIES TO
PERSONS AND DAMAGE TO EQUIPMENT.
WARNING:_______ DO NOT PUT YOUR WEIGHT ON A THRUST REVERSER THAT IS KEPT OPEN
WITH A HOLD-OPEN ROD ONLY. YOUR WEIGHT CAN CAUSE THE FAILURE
OF THE HOLD-OPEN ROD. THE THRUST REVERSER IS HEAVY AND CAN
FALL CLOSED QUICKLY, WHICH CAN CAUSE INJURIES TO PERSONS AND
DAMAGE TO EQUIPMENT.
WARNING:_______ YOU MUST OPERATE THE HAND PUMP TO PRESSURIZE THE COWL OPENING
SYSTEM TO THE FULLY OPEN POSITION BEFORE YOU REMOVE THE
HOLD-OPEN ROD. IF YOU REMOVE THE HOLD-OPEN ROD WITHOUT
HYDRAULIC PRESSURE IN THE COWL OPENING SYSTEM, THE THRUST
REVERSER CAN FALL QUICKLY. THIS CAN CAUSE INJURIES TO PERSONS
AND DAMAGE TO EQUIPMENT. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 EXHAUST 1(41)
