Fuel Temperature (TFUEL) Exceedance

TASK 73-32-00-810-806-A
Fuel Temperature (TFUEL) Exceedance

1. Possible Causes

[6003EM]
[6002EM]
INTEGRATED FUEL PUMP AND CONTROL [4360KS]

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
TSM TASK 79-21-00-810-814-A	Engine Fuel/Oil Heat Exchanger (FOHE) Bypass Valve Position Error Track Check in Channel A
TSM TASK 79-21-00-810-830-A	Engine Fuel/Oil Heat Exchanger (FOHE) Bypass Valve Position Error Track Check in Channel B
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 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
AMM 79-21-08-000-801	Removal of the Fuel/Oil Heat Exchanger
AMM 79-21-08-400-801	Installation of the Fuel/Oil Heat Exchanger
AMM 79-21-11-000-802	Removal of the Air/Oil Heat Exchanger
AMM 79-21-11-400-802	Installation of the Air/Oil Heat Exchanger

3. Fault Confirmation
Subtask 73-32-00-710-055-A ** ON A/C NOT FOR ALL

A. Test
(1) Do an engine run to idle to confirm repair of this fault AMM 71-00-00-860-822 and AMM 71-00-00-860-823.
(2) Shutdown the engine AMM 71-00-00-860-814.
(3) On MCDU screen, check if the fault is displayed on ground scanning report.

NOTE: The Electronic Engine Control (EEC) has detected that the fuel temperature has exceeded its high temperature limit. This may indicate a problem with the fuel and oil thermal management system.

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 procedure for 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 73-32-00-810-057-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) Do a check of the MCDU for engine Fuel/Oil Heat Exchanger (FOHE) bypass valve (4112KS) out of position faults.
(a) If the maintenance messages related to the Fuel/Oil Cooler (FOC) bypass valve mechanical failure on channel A or channel B are present, troubleshoot this fault first. Refer to (Ref. TSM TASK 79-21-00-810-814) or (Ref. TSM TASK 79-21-00-810-830).
(3) If no faults were present:
(a) Replace [6003EM] AMM 79-21-08-000-801 and AMM 79-21-08-400-801.
(b) Do the test given in Para. 3.
(4) If the fault continues:
(a) Replace [6002EM] AMM 79-21-11-000-802 and AMM 79-21-11-400-802.
(b) Do the test given in Para. 3.
(5) If the fault continues:
(a) Replace INTEGRATED FUEL PUMP AND CONTROL [4360KS] AMM 73-11-01-000-801 and AMM 73-11-01-400-801.
(b) Do the test given in Para. 3.

5. Close-up
Subtask 73-32-00-860-053-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 04:36:56 UTC