Repair of Forward, Mid and Aft Acoustical Panels when Missing Cup [CFMI]

TASK 72-23-00-300-026-A
Repair of Forward, Mid and Aft Acoustical Panels when Missing Cup

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
(Material No.CP2266)	RTV 102
(Material No.CP2431)	RTV 730

C. Referenced Information

REFERENCE	DESIGNATION
TASK 72-23-00-000-002-A	Removal of the Forward Acoustical Panels of the Fan
TASK 72-23-00-000-003-A	Removal of the Mid Acoustical Panels
TASK 72-23-00-000-004-A	Removal of the Aft Acoustical Panels
TASK 72-23-00-400-002-A	Installation of the Forward Acoustical Panels of the Fan
TASK 72-23-00-400-003-A	Installation of the Mid Acoustical Panels
TASK 72-23-00-400-004-A	Installation of the Aft Acoustical Panels
SPM 702111
Forward Acoustical Panels
Mid Acoustical Panels
Aft Acoustical Panels

3. Job Set-up
Subtask 72-23-00-941-103-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).
(4) Put a WARNING NOTICE(S) to tell persons not to start the engine 1(2).
(5) Put an ACCESS PLATFORM 1M(3 FT) in position at the front of the engine.

Subtask 72-23-00-010-129-A ** ON A/C NOT FOR ALL

B. Remove the forward or mid or aft acoustical panel (Ref. AMM TASK 72-23-00-000-002) or (Ref. AMM TASK 72-23-00-000-003) or (Ref. AMM TASK 72-23-00-000-004).

Forward Acoustical Panels ** ON A/C NOT FOR ALL

Mid Acoustical Panels ** ON A/C NOT FOR ALL

Aft Acoustical Panels ** ON A/C NOT FOR ALL

4. Procedure
Subtask 72-23-00-350-066-A ** ON A/C NOT FOR ALL

A. Repair the unbounded cup
(1) Clean the area to be repaired SPM 702111.
(2) Apply RTV 732 (Material No.CP2242) or RTV 102 (Material No.CP2266) or RTV 730 (Material No.CP2431) on the panel's cup surface.
(3) Install the cup on the forward or mid or aft acoustical panel.

NOTE: Acoustical panel must be installed in a short time after RTV application (before polymerisation).

5. Close-up
Subtask 72-23-00-410-122-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Install the forward or mid or aft acoustical panel (Ref. AMM TASK 72-23-00-400-002) or (Ref. AMM TASK 72-23-00-400-003) or (Ref. AMM TASK 72-23-00-400-004).

NOTE: Acoustical panel must be installed in a short time after RTV application (before polymerisation).

(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:33:44 UTC