B.
Access

 (1)  
Location Zone
 149 Aft Section of Keel Beam

 C.
Procedure

 S 424-013
 (1)  
Install the upper aft APU flame arrestor in the drain tubing between the coupling nut and the coupling body.

 S 434-014

 (2)  
Install one retaining ring on the body ferrule and the other retaining ring on the nut ferrule.

 S 434-015

 (3)  
Install two new O-rings, one on the body ferrule and one on the nut ferrule.

 S 434-016

 (4)  
Connect the retainer halves.

 S 434-017

 (5)  
Install the coupling nut on the coupling body.

 S 434-062

 (6)  
Install lockwire on the coupling nut.

 S 094-112
 WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (7)  Remove the door locks from the landing gear doors and close the doors (AMM 32-00-15/201).
 TASK 28-25-07-004-040
 4. Remove the Forward APU Flame Arrestor (Fig. 401)
_____________________________________
 A. References
 (1)  AMM 53-01-01/401, Floor Panels
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 28-25-07
 ALL  ú ú 04 Page 403 ú May 28/99

A

757
MAINTENANCE MANUAL

 B. Access
 (1)  
Location Zones
 241 Passenger Cabin - Section 44 (Left)
 242 Passenger Cabin - Section 44 (Right)

 C.
Procedure

 S 014-041
 (1)  
Remove the applicable floor panel on the left side approximately 12 windows aft of the No. 2 passenger door (AMM 53-01-01/401).

 S 034-042

 (2)
Remove the coupling nut from the coupling body and slide the coupling nut and the coupling body away from the joint.

 S 034-043

 (3)  
Disconnect the two retainer halves.

 S 034-044

 (4)  
Remove and discard the two O-rings.

 S 024-045

 (5)  
Hold the flange of the forward APU flame arrestor and remove the forward APU flame arrestor from the drain tubing.

 TASK 28-25-07-404-046
 5. Install the Forward APU Flame Arrestor (Fig. 401)
　
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