(a)  
Install one new retaining ring on the ferrule.

 (b)  
Install a new O-ring on the ferrule.

 (c)  
Install a second new retaining ring on the ferrule.

 CAUTION: DO NOT USE TOOLS TO TIGHTEN THE FITTINGS OF THE FUEL
_______ LINE. DAMAGE TO THE FITTING COMPONENTS COULD OCCUR OR THE ADJACENT FITTINGS COULD LOOSEN.
 (d)  Tighten with your hand the coupling nut on the ferrule.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-25-05
 ALL  ú ú 01 Page 412 ú Jun 20/90

A
757 MAINTENANCE MANUAL
 (e)  Install the lockwire on the coupling nut.
 S 424-012
 (7) To install the flexible full coupling (Fig. 404), do these steps:
 NOTE: Make sure the two ends of the fuel line are not out of
____ alignment by more than four degrees. Make sure the offset between the two ends is not more than 0.06 inches.
 (a)  
Put the coupling nut on the ferrule on the end of one fuel line.

 (b)  
Put the flexible full coupling on the ferrule on the end of the adjacent fuel line.

 (c)  
Install one new retaining ring on each ferrule.

 (d)  
Install one new O-ring on each ferrule.

 (e)  
Put the two fuel lines together with a space of 0.15 + 0.05

_ inches between the ferrules.

 (f)  
Connect the retainer halves together on the two fuel lines.

 CAUTION: DO NOT USE TOOLS TO TIGHTEN THE FITTINGS ON THE FUEL
_______ LINE. DAMAGE TO THE FITTING COMPONENTS COULD OCCUR OR THE ADJACENT FITTINGS COULD LOOSEN.
 (g)  
Install the coupling nut onto the flexible full coupling with your hand.

 (h)  
Install the lockwire on the coupling nut.

 TASK 28-25-05-004-013
 4. Remove the APU Fuel Line in the Fuel Tanks
__________________________________________
 A. References
 (1)  
AMM 28-11-00/201, Fuel Tanks

 (2)  
AMM 28-11-01/401, Main Tank Access Door

 (3)  
AMM 28-11-02/401, Center Tank Access Door

 (4)  
AMM 28-26-00/201, Defueling

 B.
Equipment

 (1)  
Container - for use with fuel, commercialy available.

 C.
Access

 (1)  
Location Zones
 133 Wing Center Section (Left)
 134 Wing Center Section (Right)
 531 Center Wing Tank (Left)
 541 Main Tank - Rib No. 5 to No. 17 (Left)

 (2)  
　
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