(2)
When you set the switch for the indicator lights to the test position, the indicator lights will come on.
(a)
It is possible some indicator lights will stay on when the other indicator lights go off. If this occurs, make sure it is the correct operation of each indicator light that stayed on.
(b)
For these indicator lights, a test is done for the operation of the indicator light when you do a test of the applicable system: 1) Squib test lights, P461, with the cargo fire extinguishing
system 2) Fire handles, P5, with the fire detection system 3) Fuel cut-off switches, P8, with the fire detection system 4) Green band indicators for the stab trim position with the
MAWEA system 5) ON BAT light for IRS with the IRS system
B. References
(1)
AMM 24-22-00/201, Manual Control
(2)
SSM 33-12-01 thru 33-12-99
(3)
WDM 33-12-41 thru 33-12-99
C. Access
(1) Location Zone
200 Flight Compartment
D. Procedure
S 865-002
(1)
Supply electrical power (AMM 24-22-00/201).
S 715-004
(2)
Do the operational test.
(a) At the pilot's overhead panel, P5, set and hold the switch for the indicator lights in the test position. 1) Make sure the indicator lights come on.
NOTE: Refer to SSM 33-12-01, to identify which indicator
____ lights will come on.
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A
747-400 MAINTENANCE MANUAL
2) After approximately 10 seconds, make sure the indicator lights become dim.
(b) Set the switch for the indicator lights to the bright position. 1) Make sure the indicator lights go off.
NOTE: It is possible that some of the indicator lights
____ will stay on. If this occurs, make sure that it is the correct operation of each indicator light that stayed on (WDM 33-12-41 thru 33-12-99).
S 865-005
(3) Remove the electrical power if it is not necessary (AMM 24-22-00/201).
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747-400 MAINTENANCE MANUAL
MASTER DIM AND TEST MODULE - MAINTENANCE PRACTICES
__________________________________________________
1. General_______
A. This procedure contains tasks that replace the Master Dim and Test module, the module circuit cards, or the module relays.
B. The Master Dim and Test module is installed above the P6 panel.
TASK 33-12-01-962-001
2. Master Dim and Test Module Replacement (Fig. 201)______________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AIPC 33-12-51
(3)
SSM 33-11-01, SSM 33-11-71, SSM 33-12-01
B. Access
(1) Location Zone 200 Pilots Instrument Panels - Flight Compartment
C. Prepare for the Replacement
S 862-002
(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 022-057
(1) Remove the module:
(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
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