B
Indicator Light
Figure 201
C31200
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A
747-400 MAINTENANCE MANUAL
S 032-070
CAUTION:_______USE ONLY YOUR FINGERS TO PULL OUT THE LENS CAP ASSEMBLY. TOOLS CAN CAUSE DAMAGE TO THE LENS CAP.
(4) Carefully pull out the lens cap assembly.
(a)
Hold the sides of the lens cap assembly between your fingers.
(b)
With a side-to-side movement, pull the lens cap assembly out until it releases.
NOTE: When the lens cap assembly is fully extended, it
____ releases suddenly. Do not let it hit the slide-mechanism-stops.
(c) Turn down the lens cap.
S 962-055
(5)
Replace the lamp.
S 432-073
(6)
Carefully push in the lens cap assembly.
(a)
Turn up the lens cap.
(b)
Push the lens cap assembly straight back until it locks into its position.
(c)
Close these circuit breakers and remove the DO-NOT-CLOSE tags:
1) P6 Main Power Distribution Panel a) 6D19 FLT DK LIGHTS PILOTS MISC IND 1 b) 6F20 FLT DK LIGHTS PILOTS MISC IND 2 c) 6F26 FLT DK LIGHTS F/O IND d) 6F27 FLT DK LIGHTS F/O IND & DIG DISP e) 6L4 FLT DK LIGHT CAPT IND f) 6L5 FLT DK LIGHT CAPT IND & DIG DISP
S 712-013
(7) Do a test of the lamp:
(a) Put the IND LTS switch on the P5 panel to the TEST position.
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(b) Make sure the replaced lamp comes on.
NOTE: If the two lamps in the indicator light do not come
____ on, use an eraser to clean the contacts on the diode/fuse card. To make sure the contacts in the center of the base assembly move freely, carefully push the contacts with a wooden dowel.
(c) Put the IND LTS switch to the BRT position.
S 862-062
(8) Remove electrical power if it is not necessary
(Ref 24-22-00/201).
TASK 33-12-02-002-014
3. Diode/Fuse Card Replacement (Indicator Light) (Fig. 201)_____________________________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
SSM 33-12-01
B. Access
(1) Location Zone 200 Flight Compartment, Pilots' Instrument Panels
C. Procedure
S 862-015
(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 & DIG DISP 5) 6L4 FLT DK LIGHT CAPT IND 6) 6L5 FLT DK LIGHT CAPT IND & DIG DISP
S 032-071
CAUTION:_______USE ONLY YOUR FINGERS TO PULL OUT THE LENS CAP ASSEMBLY. TOOLS CAN CAUSE DAMAGE TO THE LENS CAP.
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MAINTENANCE MANUAL
(2) Carefully pull out the lens cap assembly.
(a)
Hold the sides of the lens cap assembly between your fingers.
(b)
With a side-to-side movement, pull the lens cap assembly out until it releases.
NOTE: When the lens cap assembly is fully extended, it
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