Removal of the Mid Acoustical Panels [CFMB]

TASK 72-23-00-000-025-A
Removal of the Mid Acoustical Panels

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2242)	RTV 732

C. Referenced Information

REFERENCE	DESIGNATION
TASK 72-21-00-000-005-A	Removal of the Spinner Front Cone
TASK 72-21-00-000-006-A	Removal of the Spinner Rear Cone
TASK 72-21-00-000-007-A	Removal of the Fan Rotor Blades
Mid Acoustical Panel

3. Job Set-up
Subtask 72-23-00-941-073-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 72-23-00-010-084-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an ACCESS PLATFORM 1M(3 FT) in position at the front of the engine.
(2) Remove the spinner front cone (Ref. AMM TASK 72-21-00-000-005).
(3) Remove the spinner rear cone (Ref. AMM TASK 72-21-00-000-006).
(4) Temporarily mark each fan blade from 1 to 36.
(5) Remove 3 consecutive fan blades (Ref. AMM TASK 72-21-00-000-007).
To compensate for imbalance caused by the removal of 3 blades, it is recommended to remove 3 blades 180 degrees opposed to those previously removed.

4. Procedure
Subtask 72-23-00-020-061-A ** ON A/C NOT FOR ALL

A. Remove the Mid Acoustical Panels as follows:

CAUTION: IF YOU USE A PNEUMATIC OR ELECTRICAL SCREWDRIVER TO UNTORQUE AND LOOSEN ALL ACOUSTICAL PANEL SCREWS, MAKE SURE THAT THE SCREWDRIVER SPEED IS NOT MORE THAN 200 RPM. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN CAUSE DAMAGE TO THE ACOUSTICAL PANEL.

(1) Remove the 3 short screws (100) and the 3 long screws (101) which attach the mid acoustical panels (110).

NOTE: If one screw is found untorqued, it must be discarded and replaced for re-installation.

(2) Disengage panels from case and remove.
(3) Remove the RTV 732 (Material No.CP2242) which remains on the mid acoustical panels.

[Rev.10 from 2021] 2026.04.01 12:59:52 UTC