DOC AIRBUS | AMM A320FInstallation of the Mid Acoustical Panels [CFMB]
TASK 72-23-00-400-025-A
Installation of the Mid Acoustical Panels
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 72-23-00-860-062-A ** ON A/C NOT FOR ALL
Subtask 72-23-00-420-061-A ** ON A/C NOT FOR ALL
Subtask 72-23-00-410-078-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:59:53 UTC
Installation of the Mid Acoustical Panels
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf 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) |
| No specific | Torque wrench: range to between 139.65 and 126.35 lbf.in (1.58 and 1.43 m.daN )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2242) | RTV 732 |
| (Material No.CP5070) | vaseline |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 72-21-00-400-005-A | Installation of the Spinner Front Cone |
| TASK 72-21-00-400-006-A | Installation of the Spinner Rear Cone |
| TASK 72-21-00-400-007-A | Installation of the Fan Rotor Blades |
| TASK 72-23-00-280-006-A | Inspection of Mid Acoustical Panels |
| TASK 72-23-00-300-045-A | Replacement of the Riveted Self-Locking Nuts for the Attachment of the Forward and/or the Mid Acoustical Panels |
| TASK 72-23-00-400-043-A | Installation of Acoustical Panels Attachment Screw/Nut Locking |
| TASK 72-23-00-400-044-A | Installation of Acoustical Panels Attachment Screw Locking |
| SPM 706612380024 | |
Mid Acoustical PanelSubtask 72-23-00-860-062-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
4. Procedure(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 72-23-00-420-061-A ** ON A/C NOT FOR ALL
A. Install the Mid Acoustical Panels as follows:
(2) Do a visual inspection of the mid acoustical panel cup (Ref. AMM TASK 72-23-00-280-006).
(3) If panel cup is found pierced (Ref. AMM TASK 72-23-00-400-044).
(4) Install the panel assy on the forward case, and attach it with three short screws (100) and three long screws (101).
(b) If the self-locking nut torque is within 4.5 lbf.in (0.05 m.daN) and 31 lbf.in (0.35 m.daN), TORQUE the screws to between 139.65 and 126.35 lbf.in (1.58 and 1.43 m.daN )
(c) If the self-locking nut torque is more than 31 lbf.in (0.35 m.daN) but less than 49 lbf.in (0.55 m.daN), torque the screws at the running torque value and add 44 lbf.in (0.50 m.daN).
(d) If the self-locking torque is more than 49 lbf.in (0.55 m.daN), replace the self-locking nut (Ref. AMM TASK 72-23-00-300-045).
Subtask 72-23-00-420-082-A ** ON A/C NOT FOR ALL CAUTION:
COATING SCREWS IS MANDATORY.
(1) Apply a layer of vaseline (Material No.CP5070) screw threads and contact faces under screw heads. (2) Do a visual inspection of the mid acoustical panel cup (Ref. AMM TASK 72-23-00-280-006).
(3) If panel cup is found pierced (Ref. AMM TASK 72-23-00-400-044).
(4) Install the panel assy on the forward case, and attach it with three short screws (100) and three long screws (101).
NOTE: The longest screws have to be re-installed at the aft end of panel.
CAUTION:
DO NOT EXCEED THE SPEED OF 200 RPM TO TORQUE ALL ACOUSTICAL PANEL SCREWS BY USING PNEUMATIC OR ELECTRICAL SCREW DRIVERS.
(5) Measure the self-locking nut torque of each nut when you start to tighten the screw. NOTE: Whenever possible, start to torque with the screws in the center of the acoustical panels.
NOTE: Make sure that the screws are not damaged, replace them if necessary.
(a) If the self-locking nut torque is less than 4.5 lbf.in (0.05 m.daN), (Ref. AMM TASK 72-23-00-400-043). (b) If the self-locking nut torque is within 4.5 lbf.in (0.05 m.daN) and 31 lbf.in (0.35 m.daN), TORQUE the screws to between 139.65 and 126.35 lbf.in (1.58 and 1.43 m.daN )
(c) If the self-locking nut torque is more than 31 lbf.in (0.35 m.daN) but less than 49 lbf.in (0.55 m.daN), torque the screws at the running torque value and add 44 lbf.in (0.50 m.daN).
(d) If the self-locking torque is more than 49 lbf.in (0.55 m.daN), replace the self-locking nut (Ref. AMM TASK 72-23-00-300-045).
B. Optional Procedure
(1) Apply RTV 732 for mid acoustical panels as follows:
5. Close-up(1) Apply RTV 732 for mid acoustical panels as follows:
CAUTION:
MAKE SURE THAT YOU APPLY MATERIAL RTV 732 AT AN AMBIENT TEMPERATURE OF 59 TO 95 DEG.F (15 TO 35 DEG.C) AND WITH A HYGROMETRY OF 40 TO 70 PERCENT. IF YOU DO NOT OBEY THIS INSTRUCTION, THERE IS A RISK THAT MATERIAL RTV 732 WILL NOT DRY CORRECTLY.
(a) Apply RTV 732 (Material No.CP2242) between mid acoustical panels and between forward edge of mid acoustical panels and fan inlet case SPM 706612380024. Polish up to the duct profile. Subtask 72-23-00-410-078-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Install the fan rotor blades at the locations recorded at the removal (Ref. AMM TASK 72-21-00-400-007).
(2) Install the spinner rear cone (Ref. AMM TASK 72-21-00-400-006).
(3) Install the spinner front cone (Ref. AMM TASK 72-21-00-400-005).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Remove the access platform(s).
(6) Remove the WARNING NOTICE(S).
(1) Install the fan rotor blades at the locations recorded at the removal (Ref. AMM TASK 72-21-00-400-007).
(2) Install the spinner rear cone (Ref. AMM TASK 72-21-00-400-006).
(3) Install the spinner front cone (Ref. AMM TASK 72-21-00-400-005).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Remove the access platform(s).
(6) Remove the WARNING NOTICE(S).