Fuel Flow not at Shutoff During Start - Failure on Both Channels

TASK 73-11-00-810-845-A
Fuel Flow not at Shutoff During Start - Failure on Both Channels

1. Possible Causes

INTEGRATED FUEL PUMP AND CONTROL [4360KS]
[4000KS]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 71-00-00-810-834-A	General Troubleshooting Guidelines for Additional Troubleshooting Information
TSM TASK 71-00-00-810-835-A	Component and Harness Intermittent Troubleshooting Procedure for Guidance Troubleshooting Intermittent Faults
AMM 71-00-00-860-814	Shutdown of the Engine
AMM 71-00-00-860-822	Start the Engine (Normal Manual Start)
AMM 71-00-00-860-823	Start the Engine (Normal Automatic Start)
AMM 73-11-01-000-801	Removal of the Integrated Fuel Pump and Control (IFPC)
AMM 73-11-01-400-801	Installation of the Integrated Fuel Pump and Control (IFPC)
AMM 73-21-01-000-801	Removal of the Electronic Engine Control (EEC)
AMM 73-21-01-400-801	Installation of the Electronic Engine Control (EEC)
AMM 78-36-00-010-802	Opening of the Thrust Reverser Cowl-Doors
AMM 78-36-00-410-802	Closing of the Thrust Reverser Cowl-Doors
EEC Wiring Harnesses
Integrated Fuel Pump and Control Wiring Harnesses

3. Fault Confirmation
Subtask 73-11-00-710-105-A ** ON A/C NOT FOR ALL

A. Not Applicable

NOTE: The Electronic Engine Control (EEC) channel A and B have detected that the Integrated Fuel Pump and Control (IFPC) Fuel Metering Valve (FMV) is not in the shutoff position (closed) when a ground start has been initiated and fuel has not been commanded on. The integrated fuel pump and control is mounted of the top of the main gearbox at the 4 o'clock position.

Refer to the general troubleshooting guidelines for additional troubleshooting information (Ref. TSM TASK 71-00-00-810-834).
Refer to the component and harness intermittent troubleshooting guidelines for additional guidance troubleshooting intermittent faults (Ref. TSM TASK 71-00-00-810-835).

4. Fault Isolation

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.

WARNING: REFER TO THE MSDS FOR ALL MATERIAL USED AND THE MANUFACTURER'S SAFETY INSTRUCTIONS FOR ALL EQUIPMENT USED. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.

CAUTION: MAKE SURE YOU REMOVE ELECTRICAL POWER FROM THE EEC BEFORE YOU REMOVE THE ELECTRICAL CONNECTORS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EEC CAN OCCUR.

Subtask 73-11-00-810-106-A ** ON A/C NOT FOR ALL

A. Do the steps that follow:
(1) Open the thrust reverser cowl-doors AMM 78-36-00-010-802.
(2) Look at the MCDU to see if the maintenance messages related to the Fuel Metering Valve (FMV) position disagree were set during the same flight leg or ground leg. If the maintenance messages were set, do the corrective action for that fault first.
(a) If the maintenance messages were not set, go to the next step.
(3) Replace INTEGRATED FUEL PUMP AND CONTROL [4360KS] AMM 73-11-01-000-801 and AMM 73-11-01-400-801.
(a) Do the test given in the Para. 4.B.
(4) If the fault continues:
(a) Replace [4000KS] AMM 73-21-01-000-801 and AMM 73-21-01-400-801.
(b) Do the test given in the Para. 4.B.

Subtask 73-11-00-710-106-A ** ON A/C NOT FOR ALL

B. Repair confirmation
(1) Do an engine run to idle to confirm repair of this fault AMM 71-00-00-860-822 or AMM 71-00-00-860-823.
(a) Shutdown the engine AMM 71-00-00-860-814.
(b) On MCDU screen, make sure that the fault is not displayed on ground scan report.

5. Close-up
Subtask 73-11-00-860-094-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(a) Close the thrust reverser cowl-doors AMM 78-36-00-410-802.

[Rev.8 from Aug 2018] 2026.04.04 04:40:50 UTC