SIDEWALL LAVATORY (EXAMPLE)
Lavatory Lights Ballast Installation
Figure 401 (Sheet 2)
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A
747-400 MAINTENANCE MANUAL
LAVATORY CALL RESET SWITCH - REMOVAL/INSTALLATION
_________________________________________________
1. General_______
A. This procedure contains the tasks that remove and install the lavatory call reset switch.
TASK 33-26-06-004-001
2. Lavatory Call Reset Switch - Removal (Fig. 401)____________________________________
A. References
(1)
SSM 33-26-01 thru 33-26-02
(2)
IPC 33-26-00 Fig. 50
B. Access
(1) Location Zone
200 Upper Half of Fuselage
C. Switch Removal
(1) S 864-003Remove electrical power from the switch: (a) Open each applicable circuit breaker and attach the DO-NOT-CLOSE tag: 1) On the DC power distribution panel, P180.
(2) S 034-004Turn the switch cover counterclockwise and remove it from the switch.
(3) S 034-005Turn the switch retainer that is behind the panel 45 degrees and remove it through the square hole in the lavatory panel.
(4) S 024-006Pull the switch assembly through the square hole in the panel.
(5) S 034-007Disconnect the electrical wires from the switch.
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A
747-400
MAINTENANCE MANUAL
Lavatory Call Rest Switch Component Location
Figure 401
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A
747-400 MAINTENANCE MANUAL
TASK 33-26-06-404-008
3. Lavatory Call Reset Switch - Installation (Fig. 401)_________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
SSM 33-26-01 thru 33-26-02
(3)
IPC 33-26-00 Fig. 50
B. Access
(1) Location Zone 200 Upper Half of Fuselage
C. Switch Installation
S 434-009
(1)
Connect the electrical wires to the reset switch.
S 424-010
(2)
Put the switch assembly through the square hole in the panel.
S 434-011
(3)
Install the switch retainer on the switch.
S 434-012
(4)
Put the switch retainer through the square hole in the panel.
S 434-013
(5)
Turn the switch and the switch retainer 45 degree to lock the corners of the retainer to the panel.
S 434-014
(6)
Install and tighten the switch cover.
D. Switch Test
S 864-023
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-015
(2)
Remove each DO-NOT-CLOSE tag.
(a) Close each circuit breaker that was opened.
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