(2)
SSM 33-28-04
B. Access
(1) Location Zone
200 Upper Half of Fuselage
C. Lamp Replacement
S 862-012
(1) Do one of these steps to remove electrical power from the sidewall light:
(a)
At the attendant's panel, set the switch to the off position and attach the DO-NOT-OPERATE tag.
(b)
Open each applicable circuit breaker and attach the DO-NOT-CLOSE tag: 1) On the power distribution center panel, P414.
S 032-015
(2)
SIDEWALL LIGHT WITH A LENS;
Remove each fastener and remove the lens.
S 962-013
(3)
Carefully replace the lamp.
(a) If the lamp has a cover or end cap, remove these parts and install them on the new lamp.
S 432-016
(4) SIDEWALL LIGHT WITH A LENS;
Install the lens with the fasteners.
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747-400 MAINTENANCE MANUAL
D. Lamp Test
S 862-017
(1)
Supply electrical power (AMM 24-22-00/201).
S 862-018
(2)
Remove each DO-NOT-OPERATE or DO-NOT-CLOSE tag.
(a) Close each circuit breaker that was opened.
S 712-023
(3) At the attendant's panel, set the switch for the sidewall light to the on position.
(a) Make sure the new lamp comes on correctly.
S 862-026
(4)
Set the sidewall light to the usual mode.
(5)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
S 862-011
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MAINTENANCE MANUAL
SIDEWALL LIGHT
(EXAMPLE)
SIDEWALL LIGHT WITH A LENS
Upper Deck Sidewall Lights - Lamp ReplacementFigure 201
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747-400 MAINTENANCE MANUAL
UPPER DECK SIDEWALL LIGHTS BALLAST - REMOVAL/INSTALLATION
_________________________________________________________
1. General_______
A. This procedure has these tasks:
(1)
Sidewall Light - Ballast Removal
(2)
Sidewall Light - Ballast Installation
TASK 33-28-04-004-001
2. Sidewall Light - Ballast Removal (Fig. 401)________________________________
A. References
(1)
AMM 25-21-02/401, Upper Deck Window Reveal and Shade
(2)
SSM 33-28-04
B. Access
(1) Location Zone
200 Upper Half of Fuselage
C. Ballast Removal
(1) S 864-002Open this circuit breaker and attach a DO-NOT-CLOSE tag: (a) P414 Power Distribution Center - Left 1) 414L17 UPR DK WNDW REVEAL LIGHT
(2) S 014-028BALLAST BEHIND THE SIDEWALL; Remove the window reveal (sidewall) panel (AMM 25-21-02/401).
NOTE:____ The ballast is on the back side of the window reveal panel.
(3) S 014-022BALLAST ABOVE THE SIDEWALL LIGHT; Get access to the ballast: (a) Carefully remove the lamp from the applicable sidewall light. (b) Remove a screw from the base plate of the light assembly opposite the hinge.
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