Loss of the RAC Torque Motor Control through the two Channels on Engine 2

TASK 73-29-00-810-913-A
Loss of the RAC Torque Motor Control through the two Channels on Engine 2

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 73-29-00-810-882-A	Loss of the RAC Torque Motor Control through the Channel A on Engine 2
TSM TASK 73-29-00-810-883-A	Loss of the RAC Torque Motor Control through the Channel B on Engine 2
AMM 73-29-00-710-040	Operational Test of the FADEC on the ground (with Engine Motoring)

3. Fault Confirmation
Subtask 73-29-00-710-225-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the operational test of the FADEC 2A and 2B on the ground (with engine motoring) AMM 73-29-00-710-040.

4. Fault Isolation
Subtask 73-29-00-810-205-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance messages J7, HMU (RAC TM), ECU and J8, HMU (RAC TM), ECU:

do the following troubleshooting procedures (Ref. TSM TASK 73-29-00-810-882) and (Ref. TSM TASK 73-29-00-810-883).

[Rev.8 from Aug 2018] 2026.04.04 04:36:02 UTC