Display of the Operational Warning for a Thrust Reverser Deactivation on the Upper ECAM Display Unit on Engine

TASK 78-31-00-810-939-A
Display of the Operational Warning for a Thrust Reverser Deactivation on the Upper ECAM Display Unit on Engine

NOTE: This task is only applicable for CFM56-5B engines which have incorporated ECU software standard 5BS2 or higher.

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 73-29-00-860-801	Change of the Inhibition Status of the Thrust Reverser System
AMM 78-30-00-040-040	Deactivation of the Thrust Reverser System
AMM 78-30-00-440-040	Reactivation of Thrust Reverser

3. Fault Confirmation
Subtask 78-31-00-710-255-A ** ON A/C NOT FOR ALL

A. Not Applicable

4. Fault Isolation
Subtask 78-31-00-810-281-A ** ON A/C NOT FOR ALL

A. Do the procedure that follows:
(1) Make sure that the thrust reverser system is deactivated as per AMM 78-30-00-040-040 and make sure that no maintenance messages related to the thrust reverser system are present.
(2) If no other messages related to the thrust reverser system are present, it is an operational warning. No more action is necessary.
(3) If the thrust reverser system was re-activated through the procedure AMM 78-30-00-440-040 and the ECAM warnings ENGX REV INHIBITED or ENGX REVERSER FAULT is shown, change the inhibition status of the thrust reverser system AMM 73-29-00-860-801.

[Rev.8 from Aug 2018] 2026.04.04 04:38:06 UTC