747-400 AMM 飞机维护手册 灯 LIGHTS(24)

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 (2)  Install the circuit card: (a) Put the replacement card in the module and push until the card is engaged in its connector. (b) Close the module cover and install the cover screws. (c) Close the module access panel on the closet wall.
 S 862-025
 (3)  Close these circuit breakers and remove the DO-NOT-CLOSE tags: (a) P6 Main Power Distribution Panel 1) 6F19 FLT DK LIGHTS PILOTS MISC IND 1 2) 6F20 FLT DK LIGHTS PILOTS MISC IND 2 3) 6F26 FLT DK LIGHTS F/O IND 4) 6F27 FLT DK LIGHTS F/O IND & DGTL DSPL 5) 6L4 FLT DECK LIGHT CAPT IND 6) 6L5 FLT DECK LIGHT CAPT IND DGTL DSPL
 S 862-024
 (4)  Supply electrical power (AMM 24-22-00/201).
 S 712-062
 (5)  Do a test of the circuit card: (a) Put the IND LTS switch on the P5 panel to the TEST position and hold the switch in that position. (b) Make sure the panel indicator lights come on. (c) Hold the IND LTS switch in the TEST position longer than 10 seconds.
 NOTE:____ A time delay relay installed in the module operates after 10 seconds. At that time, the relay connects the dimmer cards in series with the indicator lamps and the lamp power.

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747-400 MAINTENANCE MANUAL
 (d)  After 10 seconds, make sure the indicator lights change from a bright intensity to a dim intensity.
 NOTE: Indicator lights with red lenses will not change to
____
 dim intensity.

 (e)  
Put the IND LTS switch in the BRT position.

 (f)  
Make sure the indicator lights go off.

 NOTE:____It is possible some indicator lights will not go off. A system defect or a system configuration can make its indicator light stay on.
 S 862-032
 (6)  Remove the electrical power if it is not necessary
 (AMM 24-22-00/201).

 TASK 33-12-01-962-033
 4. Module Relay Replacement (Fig.________________________201)
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AIPC 33-12-51

 (3)  
SSM 33-12-01

 B. Access
 (1)  Location Zone 200 Pilots Instrument Panels - Flight Compartment
 C. Prepare for the Replacement
 S 862-034
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel 1) 6F19 FLT DK LIGHTS PILOTS MISC IND 1 2) 6F20 FLT DK LIGHTS PILOTS MISC IND 2 3) 6F26 FLT DK LIGHTS F/O IND 4) 6F27 FLT DK LIGHTS F/O IND & DGTL DSPL 5) 6L4 FLT DECK LIGHT CAPT IND 6) 6L5 FLT DECK LIGHT CAPT IND DGTL DSPL
 D. Replacement Procedure
 S 022-063
 (1)  Remove a relay:
 (a)  
Open the access panel on the closet wall to get access to the module. 1) The access panel on the closet wall is installed above the

 P6 panel.

 (b)  
Identify the relay to be replaced in the module.

 (c)  
Remove the installation screws from the relay.

 (d)  
Pull the relay from its socket.

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 (2)  S 422-038Install a relay: (a) Put the relay in the socket on the module. (b) Tighten the relay installation screws. (c) Close the module access panel on the closet wall.
 (3)  S 862-041Close these circuit breakers and remove the DO-NOT-CLOSE tags: (a) P6 Main Power Distribution Panel 1) 6F19 FLT DK LIGHTS PILOTS MISC IND 1 2) 6F20 FLT DK LIGHTS PILOTS MISC IND 2 3) 6F26 FLT DK LIGHTS F/O IND 4) 6F27 FLT DK LIGHTS F/O IND & DGTL DSPL 5) 6L4 FLT DECK LIGHT CAPT IND 6) 6L5 FLT DECK LIGHT CAPT IND DGTL DSPL
 (4)  S 862-040Supply electrical power (AMM 24-22-00/201).
 (5)  S 712-064Do a test of the relay: (a) Put the IND LTS switch on the P5 panel to the TEST position and hold the switch in that position. (b) Make sure the panel indicator lights come on. (c) Hold the IND LTS switch in the TEST position longer that 10 seconds.
　
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