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MAINTENANCE MANUAL
(2) S 862-085On the pilot's control stand panel, P8, set the STAB TRIM 2 switch and the STAB TRIM 3 switch to the CUTOUT position.
(3) S 862-086Open these circuit breakers and attach DO-NOT-CLOSE tags: (a) Overhead Circuit Breaker Panel, P7 1) 7E07, STAB TRIM S/O LEFT 2) 7E20, STAB TRIM S/O RIGHT (b) Aft Center Miscellaneous Circuit Breaker Panel, P84 1) LOGO LIGHTS - LEFT 2) LOGO LIGHTS - RIGHT
(4) S 942-087Put on the body harness and attach it to the attach point on the horizontal stabilizer with the attach lanyard.
(5) S 012-094Remove the six mounting screws from the lens retainer.
NOTE:____ Do not remove the four fasteners on the lens retainer.
(a) Pull out the lens assembly and put it to the side.
NOTE:____ Do not remove the lanyard.
(6) S 962-051Do these steps to replace the lamp: (a) Remove the two mounting screws from the lamp retainer.
NOTE:____ Do not turn the two adjustment screws.
(b) (c) (d) Open the lamp retainer.Remove the lamp and disconnect the electrical wires from the bottom of the lamp.Connect the electrical wires to the terminals on the bottom of the new lamp.
WARNING:_______ MAKE SURE YOU SEAL EACH BARE ELECTRICAL CONNECTION NEAR THE LIGHT TO PREVENT AN EXPLOSION OF THE FUEL FUMES. AN EXPLOSION CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(e) Seal each electrical connection (AMM 20-11-29/201).
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CAUTION: WHEN YOU INSTALL THE LAMP, MAKE SURE IT IS CORRECTLY
_______ ALIGNED AGAINST THE LAMP RETAINER. THE LAMP CAN BREAK IF YOU DO NOT INSTALL IT CORRECTLY.
(f)
Put the new lamp in the housing.
(g)
Close the lamp retainer and install the two mounting screws.
S 712-051
(7) Do these steps to test the new lamp:
(a)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
1) Aft Center Miscellaneous Circuit Breaker Panel, P84 a) LOGO LIGHTS - LEFT b) LOGO LIGHTS - RIGHT
(b)
On the pilot's overhead panel, P5, push the LOGO switch to the ON position.
(c)
Make sure the new lamp comes on.
(d)
Push the LOGO switch to the OFF position.
S 412-092
(8)
Install the lens assembly with the six mounting screws.
S 392-093
(9)
Apply sealant around the outer edge of the lens assembly (AMM 51-31-01/201).
S 942-088
(10)
Remove the attach lanyard from the horizontal stabilizer.
S 862-089
(11)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) Overhead Circuit Breaker Panel, P7
1) 7E07, STAB TRIM S/O LEFT
2) 7E20, STAB TRIM S/O RIGHT
S 862-090
(12)
On the pilot's control stand panel, P8, set both the STAB TRIM 2 switch and the STAB TRIM 3 switch to the ON position.
S 862-091
(13)
Remove electrical power if it is not necessary for other tasks (AMM 24-22-00/201).
TASK 33-45-00-962-060
3. Logo Light - Assembly Replacement (Fig. 201)
_________________________________
A. References
(1)
AMM 20-11-29/201, Seals On Open Electrical Terminals In Fuel Vapor Areas
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 51-31-01/201, Seals And Sealing
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747-400
MAINTENANCE MANUAL
B. Equipment
(1)
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 灯 LIGHTS(123)
