49-31-21
ALL ú ú 01 Page 404 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
LOW PRESSURE FUEL FILTER ELEMENT - REMOVAL/INSTALLATION
_______________________________________________________
1. General_______
A. This procedure gives the tasks to remove and to install the low pressure fuel filter element (which is referred to as the 'fuel filter element'). The fuel filter element gives protection to the fuel control unit from fuel contamination.
TASK 49-31-22-004-001
2. Low Pressure Fuel Filter Element Removal (Fig. 401)________________________________________
A. Standard Tools and Equipment
(1) Container - for fuel
B. Access
(1)
Location Zones
101 Control Cabin (Left)
205 Electronic Compartment
703 APU Compartment
(2)
Access Panels
1201 Electronic Equipment Access Door
3804 APU Cowl Door
C. Procedure
S 864-002
(1) Set the switch and the circuit breaker:
(a)
Set the APU master switch, on the P5 forward overhead panel, to the OFF position and attach a DO-NOT-OPERATE tag.
(b)
Open this circuit breaker an attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit
S 014-003
(2) Open the APU cowl door:
(a)
Open the latches for the APU cowl door.
(b)
Open the APU cowl door.
(c)
Connect the door support rods.
S 014-014
CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
(3) Remove the lower shroud:
(a)
Hold the lower shroud and open the shroud latches.
(b)
Remove the lower shroud.
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49-31-22
ALL ú ú 02 Page 401 ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE B
SEE A
FWD
FILTER HEAD A
FUEL CONTROL UNIT
PACKING
BACKUP RING FILTER HEAD CONTROL FUEL UNIT
FILTER ELEMENT FWD
FILTER BOWL B 1 PACKING ELEMENT FILTER BACKUP RING
FILTER BOWL FWD
2 1 AIRPLANES WITH THE TAFCU AIRPLANES WITHOUT THE TAFCU B 2
Low Pressure Fuel Filter Element Installation Figure 401
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49-31-22
ALL ú ú 01 Page 402 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 024-005
(4) Remove the fuel filter element:
(a)
Put a container below the fuel filter.
(b)
Remove the filter bowl from the filter head. Let the fuel in the filter head and the filter bowl drain into the container.
(c)
Remove and discard the fuel filter element and the packing.
(d)
Remove the backup ring and the packing from the filter head.
(e)
Discard the packing from the filter head.
(f)
Remove the container that is below the fuel filter.
TASK 49-31-22-404-016
3. Low Pressure Fuel Filter Element Installation (Fig. 401)_____________________________________________
A. Standard Tools and Equipment
(1) Air Source - Compressed Dry
B. Consumable Materials
(1) B00025 Solvent - P-D-680
C. References
(1) AMM 49-11-00/201, APU Power Plant
D. Access
(1)
Location Zones
101 Control Cabin (Left)
205 Electronic Compartment
703 APU Compartment
(2)
Access Panels
1201 Electronic Equipment Access Door
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