Removal of the ECU Air Cooling Tube [CFMB]

TASK 75-24-49-000-040-A
Removal of the ECU Air Cooling Tube

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
ECU Air Cooling Tube

3. Job Set-up
Subtask 75-24-49-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 75-24-49-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

4. Procedure
Subtask 75-24-49-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the ECU air cooling Tube
(1) Loosen the clamps (5) that attach the ECU air cooling tube (10) to the ECU cooling duct and the ECU.
(2) Compress the ECU air cooling tube (10) and remove it from the ECU cooling duct and the ECU.
(3) Install COVER - PROTECTION on the ECU and the ECU cooling duct.
(4) Remove the clamps (5) from the ECU air cooling tube (10).

[Rev.10 from 2021] 2026.04.01 03:10:13 UTC