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A
747-400
MAINTENANCE MANUAL
SEE A
CONTROL PACKAGE INPUT ARM SPOILER FLIGHT OUTBOARD A CAP FILTER PACKAGE CONTROL 1. SPOILER
9. NUT 8. WASHER 7. BOLT B ROD END PISTON
6. INPUT ROD SEE B
A VALVE CAP THERMAL RELIEF
WING REAR SPAR
RIG PINS A/S-22 OR A/S-23 A/S-18,A/S-20 B LINES 2. HYDRAULIC AND 12 ONLY SPOILERS NO. 4 TRANSMITTER POSITION
(4 LOCATIONS) 5. NUT 4. WASHER 3. BOLT
FWD INBD
A
Outboard Flight Spoiler Control Package Installation
Figure 201 (Sheet 1)
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747-400 MAINTENANCE MANUAL
10. BUSHING 11. WASHER
16.
BACKUP RING
17.
O-RING
16. BACKUP RING
18.
BACKUP RING
19.
O-RING
18. BACKUP RING
16.
BACKUP RING
17.
O-RING
16. BACKUP RING
15. FILTER
20. CAP
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747-400 MAINTENANCE MANUAL
D. Procedure
S 862-002
(1) Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 862-003
WARNING: OPEN THE CIRCUIT BREAKERS TO PREVENT THE SPOILER RETRACTION.
_______ IF YOU USE THE SPEED BRAKE LEVER TO LIFT THE SPOILERS, AND IF YOU RELEASE PRESSURE IN THE HYDRAULIC SYSTEMS, THE SPOILERS WILL AUTOMATICALLY RETRACT. THIS CAN CAUSE INJURY TO PERSONS.
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7, Overhead Circuit Breaker Panel
1) 7G6, SPEED BRAKE AUTO CONT
S 862-004
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.
(3)
Do this task: "Hydraulic System Pressurization" (AMM 29-11-00/201).
S 012-145
(4)
Get access to the spoiler control package:
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE
_______ AND TE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
(a) Open the applicable trailing edge panel and lower the trailing edge flaps.
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747-400
MAINTENANCE MANUAL
WARNING: DO NOT PUT A PART OF YOUR BODY BETWEEN THE SPOILER AND THE
_______ WING UNLESS THE SPOILER ACTUATOR IS LOCKED OR THE HYDRAULIC POWER IS RELEASED. THIS CAN CAUSE INJURY TO PERSONS.
(b)
Or, put the speed brake control lever in the UP position to lift the spoilers.
(c)
Install the spoiler actuator locking tool if you lifted the spoilers.
S 862-008
(5)
Do this task: "Hydraulic System Depressurization" (AMM 29-11-00/201).
S 862-009
(6)
Put the FLT CONTROL HYD POWER - WING switches for systems No. 2 and 3 on the pilots' overhead panel P5 to the SHUTOFF position.
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