Installation of the Low Pressure (LP)/High Pressure (HP) Fuel Pump [IAE]

TASK 73-12-41-400-010-B
Installation of the Low Pressure (LP)/High Pressure (HP) Fuel Pump

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: BE CAREFUL DURING THE REMOVAL/INSTALLATION OF THE LP/HP FUEL PUMP BECAUSE IT WEIGHS 30.5lb (13.8kg).

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: DO NOT LET ENGINE FUEL OR OIL FALL ON THE ENGINE. UNWANTED FUEL OR OIL MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

CAUTION: DO NOT PUT FUEL THAT HAS BEEN DRAINED FROM THE ENGINE BACK IN TO THE FUEL SYSTEM.

ZONE: 210
ZONE: 400
FIN: 2001EM ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )
No specific	Torque wrench: range to between 90 and 70 lbf.in (1.02 and 0.79 m.daN )
No specific	Torque wrench: range to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )
No specific	Torque wrench: range to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )
No specific	Torque wrench: range to between 611 and 566 lbf.in (6.90 and 6.40 m.daN )
IAE1R18003	1	WRENCH

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-124)	Isopropyl Alcohol, Technical grade
(Material No.V02-147)	lockwire
(Material No.V10-038)	petroleum
(Material No.V10-060)	liquid paraffin
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
121	SEALING RING	AIPC 73-12-41-80-040
64	SEALING RING	AIPC 73-12-41-80-040
68	SEALING RING	AIPC 73-12-41-80-040
81	SEALING RING	AIPC 73-12-41-80-100
86	SEALING RING	AIPC 73-12-41-80-110
115	SEALING RING	AIPC 73-12-41-81-165
110	SEALING RING	AIPC 79-21-43-80-060

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-23-13-911-010-A	Procedures for the Installation of Preformed Packings
TASK 70-40-11-911-014-A	Locking Devices General Information
TASK 71-00-00-710-012-B	Test No.3 : Idle Leak Check
TASK 71-00-00-710-046-B	Test No.2 : Wet Motor Leak Check
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 73-11-47-400-010-A	Installation of the Rigid Fuel Tube, Aircraft to the LP Pump
TASK 73-11-47-400-011-A	Installation of the Rigid Fuel Tube, Fuel Diverter and Return Valve (FDRV) to the Aircraft
TASK 73-22-52-400-010-B	Installation of the Fuel Metering Unit (FMU)
TASK 73-31-17-400-010-B	Installation of the Fuel Flow Transmitter
LP/HP Fuel Pump
Rigid Fuel Tubes and Fuel Flow Transmitter
Electrical Connectors and Fuel Tubes
LP/HP Fuel Pump

3. Job Set-up
Subtask 73-12-41-860-052-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 73-12-41-010-060-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowls are open (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 73-12-41-110-051-A ** ON A/C NOT FOR ALL

A. Cleaning of the LP/HP Fuel Pump Mounting Pad
(1) Use a Textile-Lint free Cotton - (Material No.14SBA1) , made moist with V01-124Isopropyl Alcohol, Technical grade, to clean the LP/HP fuel pump mounting pad on the gearbox.

Subtask 73-12-41-420-056-A ** ON A/C NOT FOR ALL

B. Installation of the Fuel Pump
(1) Remove the covers/caps/plugs from all of the openings.
(2) Install the fuel pump (83).

LP/HP Fuel Pump ** ON A/C NOT FOR ALL

(a) Lubricate new sealing rings (81) and (86) with liquid paraffin (Material No.V10-060) or petroleum (Material No.V10-038) .
(b) Install the new AIPC 73-12-41-80-100 SEALING RING (81) and AIPC 73-12-41-80-110 SEALING RING (86) in the grooves of the fuel pump (83) (Ref. AMM TASK 70-23-13-911-010).
(3) Install the pump on the adapter.

CAUTION: HOLD THE WEIGHT OF THE LP/HP FUEL PUMP UNTIL THE CLAMP IS FULLY INSTALLED TO PREVENT DAMAGE TO THE PUMP SHAFT AND SPLINE.

(a) Align the spline shaft of the fuel pump (83) with the spline gear of the gearbox.
(b) Align the aligning pin on the pump with the aligning hole in the adapter (85).
(c) Install the pump (83) on the adapter (85).
(d) Put the clamp (82) around the flanges of the adapter (85) and the fuel pump (83).
(e) Lock the clamp (82) on the flanges with the T-bolt, the trunnion and the stiff-nut.
(f) Tighten the stiff-nut to engage with the fail-safe latch of the clamp (82).

NOTE: The fail-safe latch clicks when it is engaged.

(g) TORQUE the stiff-nut to between 90 and 70 lbf.in (1.02 and 0.79 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

Subtask 73-12-41-410-055-A ** ON A/C NOT FOR ALL

C. Install the fuel flow transmitter (72) (Ref. AMM TASK 73-31-17-400-010).

Rigid Fuel Tubes and Fuel Flow Transmitter ** ON A/C NOT FOR ALL

Subtask 73-12-41-420-057-A ** ON A/C NOT FOR ALL

D. Connection of the Rigid Fuel Tubes and Installation of the Fuel Tube
(1) Connect the rigid fuel tubes (73) and (71) (Ref. AMM TASK 73-11-47-400-010) (Ref. AMM TASK 73-11-47-400-011).

Rigid Fuel Tubes and Fuel Flow Transmitter ** ON A/C NOT FOR ALL

(2) Install the fuel tube (11).

Electrical Connectors and Fuel Tubes ** ON A/C NOT FOR ALL

Pre SBE 73-0078
(a) Make sure that the restrictor (66) and the retaining ring (67) are installed in the fuel tube (11) at detail C.
(b) Lubricate new sealing rings (64) and (68) with liquid paraffin (Material No.V10-060) or petroleum (Material No.V10-038) at details C and M.
(c) Install the new AIPC 73-12-41-80-040 SEALING RING (64) and AIPC 73-12-41-80-040 SEALING RING (68) into the grooves on the ends of the fuel tube (11) at details C and M.
(d) Attach the flange of the fuel tube (11) to the fuel pump with the three bolts (63) at detail M.
Tighten the bolts lightly.
(e) Attach the flange of the fuel tube (11) to the FCOC with the three bolts (65) at detail C.
Tighten the bolts lightly.
(f) Connect the fuel tube (69) to the fuel tube (11) at detail D. Tighten the union nut of the fuel tube (69) lightly.
(g) Connect the fuel tube (61) to the fuel tube (11) at detail F. Tighten the union nut of the fuel tube (61) lightly.
(h) Connect the fuel tube (62) to the fuel tube (11) at detail K. Tighten the union nut of the fuel tube (62) lightly.
(i) TORQUE the bolts (63) and (65) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(j) TORQUE the union nuts of the fuel tube (69) and (61) to between 611 and 566 lbf.in (6.90 and 6.40 m.daN )

(Ref. AMM TASK 70-23-11-911-013). Use the IAE1R18003 WRENCH.
(k) TORQUE the union nut of the fuel tubes (62) to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )

.
(l) Safety the union nuts of the fuel tube (69), (61) and (62) with lockwire (Material No.V02-147) (Ref. AMM TASK 70-40-11-911-014).
(m) Attach the clip (24) to the bracket with the bolt (23), washer (22) and nut (21) at detail E.
(n) Attach the clips (26) and (29) to the bracket with the bolt (28), washer (27), spacer (30) and clipnut (25) at detail G.
(o) Attach the clip (35) to the lug with the bolt (32), washers (31) and (33) and the nut (34) at detail H.
(p) Attach the clips (37) and (39) to the lug with the bolt (36), washer (40) and nut (38) at detail I.
(q) Attach the clips (41) and (44) to the lug with the bolt (46), washers (42) and (45) and nut (43) at detail J.
(r) Attach the clips (48) and (51) to the bracket with the bolt (49), washer (50) and clipnut (47) at detail L.
(s) TORQUE the bolts (23), (28), (32), (36), (46) and (49) and nuts (21), (34), (38) and (43) to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(3) Install the fuel tubes (11) and (117)

Electrical Connectors and Fuel Tubes ** ON A/C NOT FOR ALL

SBE 73-0078
(a) Make sure that the restrictor (114) and the retaining ring (118) are installed in the fuel tube (11).
(b) Lubricate the new sealings rings (110), (115), and (121) with liquid paraffin (Material No.V10-060) or petroleum (Material No.V10-038) .
(c) Install the new AIPC 79-21-43-80-060 SEALING RING (110), AIPC 73-12-41-81-165 SEALING RING (115) and AIPC 73-12-41-80-040 SEALING RING (121) in the grooves on the ends of the fuel tubes (11) and (117).
(d) Attach the flange of the fuel tube (11) to the FCOC with the three bolts (119). Tighten the bolts lightly.
(e) Attach the flange of the fuel tube (117) to the fuel pump with the three bolts (120). Tighten the bolts lightly.
(f) Attach the flange of the fuel tube (11) to the flange of the fuel tube (117) with the three bolts (116) and the three nuts (113). Tighten the bolts lightly.
(g) Connect the fuel tube (69) to the fuel tube (117). Tighten the union nut of the fuel tube (69) lightly.
(h) Connect the fuel tube (61) to the fuel tube (117). Tighten the union nut of the fuel tube (61) lightly.
(i) TORQUE the bolts (116), (119) and (120) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(j) TORQUE the union nuts of the fuel tubes (69) and (61) to between 611 and 566 lbf.in (6.90 and 6.40 m.daN )

(Ref. AMM TASK 70-23-11-911-013). Use IAE1R18003 WRENCH.
(k) Safety the union nuts of the fuel tubes (69) and (61) with lockwire (Material No.V02-147) (Ref. AMM TASK 70-40-11-911-014).
(l) Attach the clip (24) to the bracket with the bolt (23), washer (22) and nut (21) at detail E. Clipping point 0306.
(m) Attach the clips (26) and (29) to the bracket with the bolt (28), washer (27), spacer (30) and clipnut (25) at detail G. Clipping point 0305.
(n) Attach the clips (101) and (104) to the lug with the bolt (100), washer (105), spacer (102) and nut (103) at detail I. Clipping point 0304.
(o) Attach the clips (106) and (109) to the lug with the bolt (112), washers (107) and (111), spacer (110) and nut (108) at detail J. Clipping point 0319.
(p) Attach the clips (48) and (51) to the bracket with the bolt (49), washer (50) and clipnut (47) at detail L. Clipping point 0302.
(q) TORQUE the bolts (23), (28), (100), (112) and (49) and nuts (21), (103) and (108) to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

Subtask 73-12-41-410-056-A ** ON A/C NOT FOR ALL

E. Install the Fuel Metering Unit (FMU) (1) (Ref. AMM TASK 73-22-52-400-010)

LP/HP Fuel Pump ** ON A/C NOT FOR ALL

(1) Install the FMU (1) to the fuel pump.
(2) Install the tubes and electrical connectors to the FMU (1).

5. Close-up
Subtask 73-12-41-410-057-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AL
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AL
(5) Remove the WARNING NOTICE(S).

Subtask 73-12-41-865-051-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
FOR FIN: 1000EM2 (ENGINE2)
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26

Subtask 73-12-41-790-052-A ** ON A/C NOT FOR ALL

C. Test Requirements
(1) Do an idle leak check (Ref. AMM TASK 71-00-00-710-012).

NOTE: A wet motor leak check (Ref. AMM TASK 71-00-00-710-046) may be used to check for leaks, but this must be followed by an idle leak check (Ref. AMM TASK 71-00-00-710-012).

[Rev.10 from 2021] 2026.04.01 03:00:17 UTC