(m)
Remove the air source and the pressure gage.
(n)
Connect the fuel line to the fuel filter inlet for the APU again.
(o)
Make sure the tube nuts are tight.
(p)
Go into the No. 1 tank.
(q)
Remove the plug from the T-fitting at the 70.85 rib web.
(r)
Install the pressure relief valve for the APU in the T-fitting again.
S 864-055
(4)
Remove all of the tools and the equipment from the fuel tanks.
S 414-056
(5)
Install the access panel for the center tank (AMM 28-11-31/401).
S 414-057
(6)
Install the access panel for the No. 1 tank (AMM 28-11-11/401).
TASK 28-22-81-404-058
6. Flexible APU Fuel Line Removal______________________________
A. Equipment
(1) Container - to catch fuel
B. References
(1)
AMM 12-31-00/201, Access Doors and Panels - Identification
(2)
AMM 12-31-41/201, Body Section 48 Access Doors and Panels
(3)
AMM 24-22-00/201, Manual Control
(4)
AMM 25-27-15/401, Carpets
(5)
AMM 53-21-00/401, Passenger Cabin Floors
C. Access
(1) Location Zones
108 Aft Half of Cabin
218 Aft Cargo Compartment
220 Aft Cargo Compartment Equipment Bay
702 Tail Compartment Access Door
701 Tail Compartment
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737-300/400/500MAINTENANCE MANUAL
(2) Access Panels
3701 Stabilizer Trim Access Door
3804 APU Cowl Door
D. Procedure
S 014-059
(1)
Remove the aisle carpets at station 660 (AMM 25-27-15/401).
S 014-064
(2)
Remove the floor panel at Station 660 (AMM 53-21-00/401) to get access to the interconnect fitting on the center tank.
S 864-060
(3)
Remove the external electrical power from the airplane
(AMM 24-22-00/201).
S 864-061
(4)
Open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a) P6 Main Power Distribution Panel
1) APU CONT
S 034-066
WARNING: DO NOT CONNECT THE ELECTRICAL POWER TO THE AIRPLANE WHEN THE
_______ FUEL LINES ARE DISCONNECTED. CAREFULLY DO ALL OF THE SAFETY PRECAUTIONS FOR PROCEDURES WITH OPEN TANKS. AN EXPLOSION, BAD INJURIES TO PERSONS, AND DAMAGE TO EQUIPMENT CAN OCCUR.
(5) AIRPLANES WITH BELLOWS ON THE CENTER TANK FITTING; Do these steps to disconnect the fuel line from the center tank fitting (View C, Fig. 401).
(a)
Remove the bolts that attach the flexible shroud flange to the center tank fitting.
(b)
Put a container below the drain mast for the APU shroud to catch fuel.
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737-300/400/500MAINTENANCE MANUAL
(c)
Pull the flexible shroud away from the center tank fitting.
(d)
Disconnect the coupling nut for the flexible fuel line. S 034-130
WARNING:_______ DO NOT CONNECT THE ELECTRICAL POWER TO THE AIRPLANE WHEN THE
FUEL LINES ARE DISCONNECTED. CAREFULLY DO ALL OF THE SAFETY
PRECAUTIONS FOR PROCEDURES WITH OPEN TANKS. AN EXPLOSION, BAD
INJURIES TO PERSONS, AND DAMAGE TO EQUIPMENT CAN OCCUR.
(6) AIRPLANES WITHOUT BELLOWS ON THE CENTER TANK FITTINGS; Do these steps to disconnect the fuel line from the center tank fitting (View C, Fig. 401):
(a)
Loosen the flexible fitting until it is against the reducing ferrule on the APU shroud.
(b)
Put a container below the drain mast for the APU shroud.
