Repair of Forward, Mid and Aft Acoustical Panels when Unbonded Cup [CFMB]

TASK 72-23-00-300-044-A
Repair of Forward, Mid and Aft Acoustical Panels when Unbonded Cup

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	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP1040)	methyl ethyl ketone
(Material No.CP2242)	RTV 732
(Material No.CP2266)	RTV 102
(Material No.CP2431)	RTV 730

C. Referenced Information

REFERENCE	DESIGNATION
TASK 72-23-00-000-009-A	Removal of the Forward Acoustical Panels of the Fan
TASK 72-23-00-000-025-A	Removal of the Mid Acoustical Panels
TASK 72-23-00-000-026-A	Removal of the Aft Acoustical Panels
TASK 72-23-00-400-009-A	Installation of the Forward Acoustical Panels of the Fan
TASK 72-23-00-400-025-A	Installation of the Mid Acoustical Panels
TASK 72-23-00-400-026-A	Installation of the Aft Acoustical Panels
Fan Acoustical Panels

3. Job Set-up
Subtask 72-23-00-941-098-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 in position at the front of the engine.

Subtask 72-23-00-010-124-A ** ON A/C NOT FOR ALL

B. Remove the forward or mid or aft acoustical panel (Ref. AMM TASK 72-23-00-000-009) or (Ref. AMM TASK 72-23-00-000-025) or (Ref. AMM TASK 72-23-00-000-026)

4. Procedure
Subtask 72-23-00-350-061-A ** ON A/C NOT FOR ALL

A. Repair the unbonded cup
(1) Clean the repair area with methyl ethyl ketone (Material No.CP1040) .
(2) Apply RTV 732 (Material No.CP2242) or RTV 102 (Material No.CP2266) or RTV 730 (Material No.CP2431) on the panel cup surface.

NOTE: Cups of acoustical panels repaired per this procedure will have to be changed at first shop visit opportunity.

(3) Install the cup on the forward or mid or aft acoustical panel.

NOTE: You must install the acoustical panel in a short time after you apply the RTV (before polymerisation).

5. Close-up
Subtask 72-23-00-410-116-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Install the forward or mid or aft acoustical panel (Ref. AMM TASK 72-23-00-400-009) or (Ref. AMM TASK 72-23-00-400-025) or (Ref. AMM TASK 72-23-00-400-026).

NOTE: You must install the acoustical panel in a short time after you apply the RTV (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] 2026.04.01 12:59:52 UTC