B. Consumable Materials
(1) D00013 Grease - MIL-G-23827
C. References
(1) 29-11-00/201, Main Hydraulic Supply System
D. Access
(1) Location Zone
574 Spoiler No. 6
575 Spoiler No. 5
582 Spoiler No. 4
583 Spoiler No. 3
584 Spoiler No. 2
585 Spoiler No. 1
674 Spoiler No. 7
675 Spoiler No. 8
682 Spoiler No. 9
683 Spoiler No. 10
684 Spoiler No. 11
685 Spoiler No. 12
E. Procedure
S 863-018
WARNING:_______OPEN THE CIRCUIT BREAKER TO PREVENT THE SPOILER RETRACTION. IF YOU USE THE SPEED BRAKE LEVER TO LIFT THE SPOILERS, AND IF YOU RELEASE THE PRESSURE IN THE HYDRAULIC SYSTEMS, THE SPOILERS WILL AUTOMATICALLY RETRACT. THIS CAN CAUSE INJURY TO PERSONS.
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P7 Overhead Circuit Breaker Panel
1) 7G6, SPEED BRAKE AUTO CONT
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
12-21-21
ALL ú ú 01 Page 301 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 863-002
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Do this task: "Hydraulic System Pressurization" (Ref 29-11-00/201).
S 863-003
(3)
Put the speed brake lever in the UP detent to lift the spoilers.
S 863-005
(4)
Do this task: "Depressurize Hydraulic Systems" (Ref 29-11-00/201).
S 493-004
(5)
Install the spoiler actuator locking tools on the spoiler actuators.
S 643-006
(6)
Lubricate the inboard flight spoilers (Fig. 301).
S 643-007
(7)
Lubricate the outboard flight spoilers (Fig. 302).
S 643-008
(8)
Lubricate the ground spoilers (Fig. 303).
F. Put the Airplane Back to Its Usual Condition
S 093-009
(1)
Remove the spoiler actuator locking tools.
S 863-010
(2)
Do this task: "Hydraulic System Pressurization" (Ref 29-11-00/201).
S 863-011
(3)
Put the speed brake lever in the DOWN detent to lower the spoilers.
(4)
Do this task: "Depressurize Hydraulic Systems" (Ref 29-11-00/201).
S 863-013
(5)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
S 863-012
(a) P7 Overhead Circuit Breaker Panel
1) 7G6, SPEED BRAKE AUTO CONT
TASK 12-21-21-643-014
3. Spoiler Differential Mechanism Lubrication__________________________________________
A. Consumable Materials
(1) D00013 Grease - MIL-G-23827
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
12-21-21
ALL ú ú 01 Page 302 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
B. References
(1) 32-00-30/201, Landing Gear Door Locks
C. Access
(1) Location Zone
135 Wing Landing Gear Wheel Well, LH
136 Wing Landing Gear Wheel Well, RH
D. Procedure
S 493-015
(1) Make sure the landing gear ground locks are installed.
S 483-019
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Do this task: "Wing Landing Gear Door Lock Installation"
(Ref 32-00-30/201).
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