TCM Cutback Accommodation Activated in Flare or Take Off Phase (Control System Fault Alert)

TASK 73-11-00-810-843-A
TCM Cutback Accommodation Activated in Flare or Take Off Phase (Control System Fault Alert)

1. Possible Causes

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 71-00-00-810-852-A	Troubleshoot the Engine after an Auto Acceleration event
AMM 72-00-00-210-810	Inspection of the Engine after N1/N2 Over Speed Operation
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 73-21-00-710-807	Test No.6 - EEC Operation Test (Idle Test)
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

3. Fault Confirmation
Subtask 73-11-00-710-102-A ** ON A/C NOT FOR ALL

A. Not Applicable

NOTE: The Electronic Engine Control (EEC) has commanded the overspeed shutoff valve to partially close and reduce fuel flow after the Thrust Control Malfunction (TCM) cutback is enabled. The overspeed shutoff valve is integral to the Integrated Fuel Pump and Control (IFPC). The integrated fuel pump and control is mounted on the fuel manifold located at the 3 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 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 73-11-00-810-104-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 visual inspection of the engine after N1/N2 over speed operation AMM 72-00-00-210-810.
(a) Repair any problems found.
(b) Do the test given in the Para. 4.B.
(3) If the engine inspection is OK and/or 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 the Para. 4.B.
(4) If the fault continues:
(a) Refer to auto acceleration observed fault (Ref. TSM TASK 71-00-00-810-852).
(b) Do the test given in the Para. 4.B.

Subtask 73-11-00-710-103-A ** ON A/C NOT FOR ALL

B. Test
(1) Do a FADEC system idle test AMM 73-21-00-710-807.
(a) If the fault does not return, you have fixed the fault.

5. Close-up
Subtask 73-11-00-860-092-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 04:36:35 UTC