(2)
Open and Close the Thrust Reverser (Sling Procedure)
(3)
Operate the Thrust Reverser (Manual Procedure)
(4)
Operate the Thrust Reverser (Power Procedure)
(5)
The Thrust Reverser Deactivation/Activation For Ground Maintenance
B.
To open and close the thrust reverser refers to the opening, or separation, of the two halves of the thrust reverser. You usually will do this procedure to get access to the engine, or to the inner parts of the thrust reverser.
C.
To extend (to the deploy position) and retract (to the stow position) the thrust reverser refers to the operation positions of the thrust reverser. You usually will do this procedure to put the thrust reverser in the correct position for maintenance, or to do a check of the thrust reverser operation.
TASK 78-31-00-012-001-N00
2. Thrust Reverser Opening (Hand Pump Procedure)
_____________________________________________
A. General
(1)
You must not open, 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)
Do not extend the thrust reverser sleeves when the core cowl panels are in the open position. If you do not obey this instruction, damage to the thrust reverser sleeves and the core cowl panels can occur.
(3)
Do not open the thrust reverser halves more than 23-degrees if the thrust reverser sleeves are extended to the deploy position. Do not extend the thrust reverser sleeves to the deploy position if the thrust reverser halves are open more than 23-degrees. If you do not obey these instructions, damage to the strut and the thrust reverser sleeves can occur.
(4)
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.
(5)
If it is necessary to open the thrust reverser halves to do maintenance on the cowl opening system, use the sling method to open the thrust reverser halves. Do not use the hand pump method which follows.
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78-31-00
ALL ú ú N01 Page 201 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
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 Zone
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 Panel
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
E.
Procedure
S 042-002-N00
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPEEDBRAKE CONTROL
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