Upper Anticollision Light

Figure 401

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737-300/400/500MAINTENANCE MANUAL
 (c)  ON SOME AIRPLANES; There is a circular cutout in the duct assembly that allows access to the Upper Anticollision Light.
 S 024-006
 (3)  Remove the light.
 (a)  
Disconnect the electrical wires from the terminal block.

 (b)  
Loosen the retaining nuts.

 (c)  
Turn the light counterclockwise.

 (d)  
Pull down on the light to remove it.

 TASK 33-44-13-404-007
 3.  Upper Anticollision Light - Installation (Fig. 401)________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 25-21-45/401, Sculptured Ceiling Panels

 (3)  
SSM 33-40-02

 (4)  
WDM 33-44-01

 B. Access
 (1)  Location Zone
 100 Upper Half of Fuselage

 C. Light Installation
 S 144-008
 (1)  
Clean the inner side of the lens with a clean, soft, dry cloth.

 S 424-009

 (2)  
Install the light.

 (a)  
Hold the light assembly in its position.

 (b)  
Turn the light assembly clockwise until it engages the studs.

 (c)  
Tighten the retaining nuts.

 (d)  
Connect the electrical wires to the terminal block.

 S 414-013
 (3) Latch or install the right ceiling panel (Ref 25-21-45/401).
 D. Light Test
 S 864-030
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 864-031

 (2)  
Remove each DO-NOT-OPERATE or DO-NOT-CLOSE tag.

 (a) Close each circuit breaker that was opened.
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 S 714-032
 WARNING:_______DO NOT LET THE STROBE LIGHT FLASH DIRECTLY IN YOUR EYES. THE INTENSITY OF THE LIGHT CAN CAUSE YOU TO NOT SEE TEMPORARILY.
 (3)  Set the switch to the on position.
 (a)  Make sure the light comes on and flashes correctly.
 S 864-033
 (4)  Set the switch to the off position.
 TASK 33-44-13-004-016
 4. Upper Anticollision Light - Lens Removal (Fig. 402)
________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
SSM 33-40-02

 (3)  
WDM 33-44-01

 B. Access
 (1)  Location Zone
 107 Upper Half of Fuselage

 C. Lens Removal
 S 864-017
 (1)  Do one of these steps to remove electrical power from the upper anticollision light:
 (a)  
At the overhead panel, P5, 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 load control center panel, P18.

 S 014-018
 (2)  Get access to the upper anticollision lens.
 NOTE: The anticollision lens is on the top of the fuselage above
____
 the leading edge of the wing.

 S 024-019
 (3)  Remove the lens.
 (a)  
Remove the retaining nuts.

 (b)  
Carefully remove the retainer and the lens.

 (c)  
Remove each gasket.

 TASK 33-44-13-404-020
 5. Upper Anticollision Light - Lens Installation (Fig. 402)
_____________________________________________
 A. References
 (1)  AMM 24-22-00/201, Manual Control
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