Inspection of Forward Acoustical Panels [CFMI]

TASK 72-23-00-280-025-A
Inspection of Forward Acoustical Panels

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. Referenced Information

REFERENCE	DESIGNATION
TASK 72-23-00-000-002-A	Removal of the Forward Acoustical Panels of the Fan
TASK 72-23-00-300-026-A	Repair of Forward, Mid and Aft Acoustical Panels when Missing Cup
TASK 72-23-00-400-002-A	Installation of the Forward Acoustical Panels of the Fan
TASK 72-23-00-400-045-A	Installation of the Acoustical Panels Attachment Screw Locking

3. Job Set-up
Subtask 72-23-00-941-102-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.

4. Procedure
Subtask 72-23-00-350-065-A ** ON A/C NOT FOR ALL

A. Inspection of FWD Acoustical Panels

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Missing protective coating	No limit
2.Superficial cracks in Tedlar film	No limits in number	Do periodical checks of the acoustical panels for delamination
3.Deep cracks from bolt holes	A maximum of 2 thrucracks with 0.6 in. (15.24 mm) max length starting from attachment holes	Do periodical checks of the acoustical panels for delamination
4.Delamination	Not serviceable	Replace panel(s) (Ref. AMM TASK 72-23-00-000-002) and (Ref. AMM TASK 72-23-00-400-002)
5.Nicks, dents or impingement mark	No limits in number
6.Distortion	No limit
7.Pierced cups caused by screw head	Not serviceable	Install the panel (Ref. AMM TASK 72-23-00-400-045)
8.Unbounded cups	Not serviceable	Repair the panel (Ref. AMM TASK 72-23-00-300-026) and re-install the panel immediately (Ref. AMM TASK 72-23-00-400-002).

5. Close-up
Subtask 72-23-00-410-121-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:33:43 UTC