TASK 28-21-14-404-009
 3.  Refuel Receptacle Adapter Installation (Fig. 401)______________________________________
 A. Consumable Materials
 (1)  
D00128 Petrolatum - Technical, VV-P-236

 B.
References

 (1)  
AMM 27-81-00/201, Leading Edge Flap System

 (2)  
AIPC 28-21-01, Fig. 50

 C.
Access

 (1)  
Location Zones
 521 Leading Edge to Front Spar, Left
 621 Leading Edge to Front Spar, Right

 (2)  
Access Panels
 521BB Refuel Receptacle Access Door
 621BB Refuel Receptacle Access Door

 D.
Procedure

 (1)  
Put a large quantity of petrolateum on a new O-ring.

 (2)  
Install the new O-ring in the groove on the flange.

 S 434-011

 (3)  
Turn the flange in the clockwise direction to install the flange in the adapter.

 S 644-022
 S 434-010
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A
747-400
MAINTENANCE MANUAL

PRESSURE REFUEL STATION
SEE A
STATION PRESSURE ASEE REFUEL 
REFUEL RECEPTACLE 
INSTALLATION) (PREFERRED LANYARD O-RING RECEPTACLE 
ADAPATER 
REFUEL ADAPTER RECEPTACLE SEE B  REFUEL ADAPTER RECEPTACLE FWD SEE B PRESSURE FUEL STATION A  CAP FLANGE (6 LOCATIONS) SCREW  B  INSTALLATION) (OPTIONAL LANYARD O-RING FLANGE 
Figure 401 Refuel Receptacle Adapter 

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747-400 MAINTENANCE MANUAL
 (4)  S 644-023Put a large quantity of petrolatum on a new O-ring.
 (5)  S 434-012Install the new O-ring in the groove on the receptacle.
 (6)  S 424-013Put the adapter on the refuel receptacle with the lanyard lug in the direction of the outlet.
 (7)  S 644-024Apply a thin layer of petrolatum on the six screws.
 (8)  S 434-014Install the screws (6 locations).
 S 864-025

 CAUTION: MAKE SURE THE DEFUEL LEVER IS CORRECTLY POSITIONED IN THE
_______ RECESS ON REFUEL RECEPTACLE ADAPTER. IF THE DEFUEL LEVER IS NOT IN THE CORRECT POSITION, IT IS POSSIBLE TO DAMAGE THE REFUEL RECEPTACLE ASSEMBLY. IF THE REFUEL RECEPTACLE ASSEMBLY IS DAMAGED, A FUEL LEAK CAN OCCUR.
 (9)  
Make sure the defuel lever is correctly positioned in the recess for refuel receptacle adapter.

 S 414-015

 (10)
 Install the refuel receptacle cap.

 S 414-016

 (11)
 Close the refuel station access door.

 S 094-018
 WARNING: CAREFULLY DO ALL THE SAFETY PROCEDURES IN THE LOCK REMOVAL
_______ PROCEDURE (AMM 27-81-00/201). THE FLAPS CAN QUICKLY RETRACT IN 7 SECONDS AND CAN CAUSE INJURY OR DAMAGE.
 (12) Remove the leading edge flap safety locks, if the locks are installed (AMM 27-81-00/201).
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747-400 MAINTENANCE MANUAL
 S 214-026
 (13) Do a check for leaks during the first refuel operation (AMM 12-11-01/301).
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