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A
747-400
MAINTENANCE MANUAL
4.
CHAIN TO ACTUATOR ROD END ATTACHMENT PIN
5.
RODEND
3. CHAIN TO SPROCKET
ATTACHMENT PIN 6. CHECKNUT
7. ACTUATOR PISTON ROD 19. CHAIN
8.
SEAL ASSEMBLY
9.
VENT CAP CLAMPED
A
TO REGULATOR COVER
10. RUBBER
A
11. BOLT SPACER18. WASHER
17. COTTER PIN
16. LOCKING NUT
15. PRESSURE LINE
14. ACTUATOR
13. NUT
12. WASHER
FWD SUPPORT BRACKET
C
3. ATTACHMENT PIN 3
5. ACTUATOR
19. CHAIN ROD END
21. SPROCKET
20. WASHER
17. COTTER PIN
TORQUE TUBE STOP 0.07
INCH
0.03
A-A
3 THE HEAD OF THE ATTACHMENT PIN IS UP ON DOORS 1-4 AND DOWN ON DOOR 5
Main Entry Door Actuator and Chain Installation Figure 401 (Sheet 3)
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747-400 MAINTENANCE MANUAL
S 014-005
(4) OVERHEAD RESERVOIR INSTALLATION;
Remove the ceiling access panel above the entry door
(AMM 25-22-01/401).
S 014-006
(5) FLOOR LEVEL RESERVOIR INSTALLATION;
Remove the doorway sidewall lining and the dado panel forward of the
entry door (AMM 25-21-03/401).
S 034-021
(6) OVERHEAD RESERVOIR INSTALLATION;
Remove the lockwire from the reservoir mounting pin for access to
the safety pin location (Fig. 401), if it is necessary.
NOTE:____ Do not remove the reservoir mounting pin.
S 494-007
WARNING:_______MAKE SURE THE TOGGLE LEVER DOES NOT MOVE. THE MOVEMENT OF THE TOGGLE LEVER CAN OPEN THE RESERVOIR VALVE AND RELEASE THE RESERVOIR PRESSURE. THIS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT .
BE VERY CAREFUL WHEN YOU WORK AROUND THE EMERGENCY POWER RESERVOIR, BECAUSE THE RESERVOIR IS PRESSURIZED TO 3000 PSI.
(7)
Put the safety pin across the reservoir plunger.
S 014-008
(8)
Remove the access panel (2) from the body skin forward of the door to get access to the chain (19) and the actuator rod end (5), if it is necessary.
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747-400 MAINTENANCE MANUAL
S 014-028
(9)
If it is necessary, remove the surounding equipments/furnishings (lavatories, class dividers, etc.) to get access to the door actuator.
S 014-029
(10)
Remove the interior side wall panels to get access to the door actuator (AMM 25-21-03/401).
S 024-009
(11)
Remove the actuator (14).
(a)
Disconnect the pressure line (15, detail C) at the actuator (14).
CAUTION: DO NOT LET THE CHAIN (19) TWIST WHEN YOU REMOVE THE
_______ ACTUATOR PISTON ROD (7) FROM THE ROD END (5). THIS CAN CAUSE DAMAGE TO THE CHAIN.
(b)
Loosen the checknut (6) at the rod end (5).
(c)
Turn the actuator piston rod (7) to remove it from the rod end (5).
(d)
Remove the checknut (6) from the actuator piston rod (7).
(e)
Push the actuator piston rod (7), to the full limit of travel, into the actuator (14).
(f)
Remove the bolt (11), washer (12), nut (13) and the rubber spacer (10) from the actuator support bracket.
(g)
Move the actuator piston rod (7) from the seal assembly (8) to remove the actuator (14).
S 024-010
(12)
Remove the chain (19, detail C), if it is necessary.
(a)
Turn the chain sprocket (21) to get access to the attachment pin (3).
(b) 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 舱门 DOORS 1(58)
