(b)
Find the ceiling panel at station 568 (the fifth ceiling panel forward of the midrange lowered ceiling).
NOTE: Some airplanes have a panel installed in the
____ ceiling panel to get access to the power supply.
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A
747-400
MAINTENANCE MANUAL
CABLE TO THE UPPER BEACON MOUNTING BOLT LIGHT (4 LOCATIONS)
UPPER BEACON LIGHT POWER SUPPLY
Upper and Lower Beacon Light Power Supply Installation
Figure 401 (Sheet 1)
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747-400
MAINTENANCE MANUAL
AIR CONDITIONING BAY LOWER BEACON
ACCESS DOORS LIGHT POWER
SUPPLY
SEE B
ACCESS
PANEL
FWD
MOUNTING BOLT
POWER (4 LOCATIONS)
SUPPLY
ELECTRICAL CONNECTORS
LOWER BEACON LIGHT
LOWER BEACON LIGHT POWER SUPPLY
B
Upper and Lower Beacon Light Power Supply Installation Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
(c)
AIRPLANES WITH AN ACCESS PANEL; Open the access panel in the ceiling panel.
(d)
AIRPLANES WITHOUT AN ACCESS PANEL; Remove the ceiling panel (AMM 25-22-03/401).
S 004-032
(2) Do these steps to remove the power supply:
(a)
Disconnect the electrical connector.
(b)
Remove the mounting bolts.
(c)
Remove the power supply.
TASK 33-44-09-404-006
3. Installation (Upper Beacon Light Power Supply) (Fig. 401)______________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 25-22-03/401, Upper Deck Ceiling Panel
(3)
AIPC 33-44-09 Fig. 2
(4)
SSM 33-44-01
B. Access
(1) Location Zone 200 Forward Upper Deck, Passenger Compartment
C. Procedure
S 404-033
(1) Do these steps to install the power supply:
(a)
Put the power supply in its position.
(b)
Install the mounting bolts.
(c)
Connect the electrical connector.
S 414-009
(2) Close and latch the access panel (AMM 25-22-03/401).
D. Installation Test
S 864-010
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-011
(2)
Remove the DO-NOT-CLOSE tag and close this circuit breaker:
(a) P6 Main Power Distribution Panel 1) 6L31 ANTI COLL LTS RED
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