W DOC AIRBUS | AMM A320F

Visual Inspection of the Aft Acoustical Panel [CFML]

TASK 72-23-04-210-801-A
Visual Inspection of the Aft Acoustical Panel

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
1. Reason for the Job
This procedure gives the visual inspection criteria for the aft acoustic panels.
NOTE: The inspection criteria below are applicable after the removal of the high metal.
NOTE: You can use equivalent alternatives for standard tools, equipment and consumable materials.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
447AL, 448AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 72-23-04-000-801-A
Removal of the Aft Acoustical Panel
TASK 72-23-04-400-801-A
Installation of the Aft Acoustical Panel
F Aft Acoustical Panel
3. Job Set-up
Subtask 72-23-04-941-050-A
A. Safety Precautions
   (1) On the center pedestal, on ENG panel 115VU:
     (a) Make sure that the ENG/MODE selector switch is in the NORM position.
     (b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
     (c) Put a WARNING NOTICE(S) in position to tell persons not to operate:
  • The ENG/MODE selector switch
  • The ENG/MASTER 1(2) control switch.
   (2) On the ENG section of maintenance panel 50VU:
     (a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 72-23-04-010-050-A
B. Get Access
447AL 448AR
   (1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
4. Procedure
Subtask 72-23-04-210-050-A
A. Visual Inspection of the visible areas of the Aft Acoustic Panels
F Aft Acoustical Panel
INSPECT/CHECK
MAXIMUM SERVICEABLE LIMITS
REMARKS
1.Visual inspection of the inner surfaces of the panel


A.Local blind multi-perforations
Any amount

B.Erosion
0.008 in. (0.2 mm) in depth on all surfaces

C.Nicks, dents, scratches, impact marks on cups
0.004 in. (0.1 mm) in depth

D.Nicks, dents, scratches, cracks, flaking of the protective coating
0.008 in. (0.2 mm) in depth on all surfaces

E.Tears, punctures, cracks of protective coating
0.008 in. (0.2 mm) in depth on all surfaces

F.Missing of the protective coating
Any amount

G.Nicks, dents, scratches, impact marks on carbon plies
  • 0.012 in. (0.3 mm) in depth
  • 0.79 in. (20.1 mm) in length
  • 0.12 in. (3.0 mm) in width
  • 7.87 in. (199.9 mm) in proximity

H.Tears, cracks, punctures on the carbon plies
Not serviceable
Replace the aft acoustic panel (1) (Ref. AMM TASK 72-23-04-000-801) and (Ref. AMM TASK 72-23-04-400-801).
J.Local collapse of the surface
Not serviceable
Replace the aft acoustic panel (1) (Ref. AMM TASK 72-23-04-000-801) and (Ref. AMM TASK 72-23-04-400-801).
J. Unbonded, missing cup
Not serviceable
Replace the cup (Ref. AMM TASK 72-23-04-000-801) and (Ref. AMM TASK 72-23-04-400-801).
K.Missing screw
Not serviceable
Replace the screw (Ref. AMM TASK 72-23-04-000-801) and (Ref. AMM TASK 72-23-04-400-801).
L.Missing spacer
Not serviceable
Replace the spacer (Ref. AMM TASK 72-23-04-000-801) and (Ref. AMM TASK 72-23-04-400-801).
M.Missing aft acoustic panel (1)
Not serviceable
Replace the aft acoustic panel (1) (Ref. AMM TASK 72-23-04-000-801) and (Ref. AMM TASK 72-23-04-400-801).
2.Visual examination of the edges of the panel


A.Nicks, dents, scratches, impact marks on the carbon plies
0.008 in. (0.2 mm) in depth

B.Tears, cracks, punctures on carbon plies
Not serviceable
Replace the aft acoustic panel (1) (Ref. AMM TASK 72-23-04-000-801) and (Ref. AMM TASK 72-23-04-400-801).
C.Local collapse of surface
Not serviceable
Replace the aft acoustic panel (1) (Ref. AMM TASK 72-23-04-000-801) and (Ref. AMM TASK 72-23-04-400-801).
5. Close-up
Subtask 72-23-04-410-051-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
447AL 448AR
   (2) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 13:03:36 UTC
"Aviabrain" 2025