NOTE: Make sure each removal valve is open before you install the
____
access panel for the boost pump.
TASK 28-22-00-792-018
3. Engine Fuel Feed Lines/Coupling Vacuum Test
___________________________________________
A. Equipment
(1) C28004 - Test Equipment, Fuel-Feed Line or equivalent
(a)
Vacuum pump - able to supply a minimum vacuum of 18 inches of mercury, with a pressure gage (0-30 inches of mercury), and a shutoff valve (Fig. 201).
(b)
Pressure gage - 0-30 inches of mercury, accurate to +/- 1 inch
(c)
Plugs - closure, to close the bypass valve inlets to the fuel-feed system (Fig. 202)
(d)
Container - 5 gallon capacity, to hold fuel
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
(e)
Source - Air pressure, 100 psi
(f)
Cable - to ground the vacuum pump
B. Consumable Materials
(1) D00250 - Petroleum jelly, VV-P-236
C. References
(1)
AMM 20-50-11/201, Standard Torque Value
(2)
AMM 27-81-00/201, Leading Edge Flap and Slat Control System
(3)
AMM 28-10-00/201, Storage
(4)
AMM 28-11-11/401, Integral Fuel Tank Access Panels
(5)
AMM 28-22-00/101, Engine Fuel Feed System
(6)
AMM 28-22-41/401, Fuel Boost Pumps
(7)
AMM 28-22-61/401, Boost Pump Bypass Valves
(8)
AMM 28-22-15/401, Fuel Line and Couplings
(9)
AMM 57-30-11/401, Boost Pump Access Door
(10)
AMM 71-11-02/201, Panels - Fan Cowl
D. Access
(1)
Location Zones
303 Left Wing Inboard Leading Edge
305 Left Fuel Tank
403 Left Wing Inboard Leading Edge
405 Right Fuel Tank
(2)
Access Panels
5746 Cowl Fan Panel (LH) - Engine No. 1
5846 Cowl Fan Panel (LH) - Engine No. 2
7201 Boost Pump Access Door
7202 Fuel Tank Access Door
7203 Boost Pump Access Door
7401 Boost Pump Access Door
7402 Fuel Tank Access Door
7403 Boost Pump Access Door
E. Prepare for the Vaccuum Test
S 652-070
WARNING: OBEY ALL OF THE SAFETY PRECAUTIONS IN THE PURGING AND ENTRY
_______ PROCEDURE. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
(1)
Do this task: "Fuel Tank Purging and Entry" (AMM 28-10-00/201) for the No. 1 tank and the No. 2 tank.
S 862-017
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel
1) FUEL CONT NO. 1 AFT NO. 2 FWD CTR L
2) FUEL CONT NO. 1 FWD NO. 2 AFT CTR R
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 012-016
(3) Remove these access panels for the fuel boost pumps (AMM 57-30-11/401):
(a)
Access panel, 7201L
(b)
Access panel, 7203L
(c)
Access panel, 7401R
(d)
Access panel, 7403R
S 862-022
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE
_______ AND TE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU EXTEND OR RETRACT THE FLAPS. THE FLAPS CAN MOVE QUICKLY WITH THE HYDRAULIC POWER REMOVED. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(4) Extend the leading edge flaps (AMM 27-81-00/201).
S 492-023
WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE SAFETY LOCKS. WITHOUT SAFETY LOCKS, THE FLAPS CAN MOVE QUICKLY AND CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
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