W DOC AIRBUS | AMM A320F

Installation of Acoustical Panels Attachment Screw/Nut Locking [CFMB]

TASK 72-23-00-400-043-A
Installation of Acoustical Panels Attachment Screw/Nut Locking

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL
1. Reason for the Job
This procedure gives task to lock acoustical panel screws when the corresponding self-locking nut torque is smaller than the AMM limits. This procedure applies to any acoustical panel screws: fwd, mid and aft. Any screws and corresponding riveted self-locking nuts locked per this procedure will have to be changed at first shop visit opportunity.
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 111.3 and 100.7 lbf.in (1.26 and 1.14 m.daN ) T
No specific
Torque wrench: range to between 139.65 and 126.35 lbf.in (1.58 and 1.43 m.daN ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP1039)
acetone
(Material No.CP1041)
isopropyl alcohol
(Material No.CP2011)
stoddard solvent
(Material No.CP2242)
RTV 732
(Material No.CP2266)
RTV 102
(Material No.CP2559)
ardrox 552
(Material No.CP2560)
turco ind 79
(Material No.CP2566)
mag-chem teksol
(Material No.CP2584)
degreasol 99 R
(Material No.CP2656)
mag-chem skysol
(Material No.CP2781)
RTV 730 FS
(Material No.CP5070)
vaseline
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-040-B
Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B
Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B
Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B
Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B
Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B
Closing of the Thrust Reverser Doors
SPM 706516360008
SPM 706612380024
SPM 706619380032
3. Job Set-up
Subtask 72-23-00-941-093-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).
Subtask 72-23-00-010-116-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the fan cowls: (Ref. AMM TASK 71-13-00-010-040)
   (2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
   (3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (4) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 72-23-00-040-071-A ** ON A/C NOT FOR ALL
C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).
Subtask 72-23-00-010-117-A ** ON A/C NOT FOR ALL
D. Open the thrust reverser doors: (Ref. AMM TASK 78-36-00-010-040)
   (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
   (2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
4. Procedure
Subtask 72-23-00-420-069-A ** ON A/C NOT FOR ALL
A. Locking of the Acoustical Panels
   (1) Remove the screws if the torque of the related self-locking nut is less than the AMM limits.
   (2) Clean the screws and the nuts with acetone (Material No.CP1039) or stoddard solvent (Material No.CP2011) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) or isopropyl alcohol (Material No.CP1041) .
   (3) Apply a material on the screws of acoustical panels as follows:
     (a) For mid and aft acoustical panels:
       1 Apply a layer of vaseline (Material No.CP5070) on the screw threads and screw heads.
     (b) For the forward acoustical panel:

PRE SB CFMI 72-0213

       1 Apply a layer of vaseline (Material No.CP5070) on the screw threads and screw heads.

END OF PRE SB CFMI 72-0213


POST SB CFMI 72-0213

       2 Apply RTV 732 (Material No.CP2242) or RTV 102 (Material No.CP2266) or RTV 730 FS (Material No.CP2781) on screw threads and screw heads SPM 706516360008 SPM 706612380024 SPM 706619380032.
NOTE: The screw and riveted self-locking nut locked with silicone sealant have to be replaced at the first shop visit opportunity.

END OF POST SB CFMI 72-0213

   (4) Re-install the acoustical panels and screws.
CAUTION: DO NOT EXCEED THE SPEED OF 200 RPM TO APPROACH AND TORQUE ALL ACOUSTICAL PANEL SCREWS BY USING PNEUMATIC OR ELECTRICAL SCREW DRIVERS.
     (a) TORQUE the screws of the forward and mid panels to between 139.65 and 126.35 lbf.in (1.58 and 1.43 m.daN ) T.
     (b) Loosen and TORQUE again the screws of the forward panels to between 139.65 and 126.35 lbf.in (1.58 and 1.43 m.daN ) T.
     (c) TORQUE the screws of the aft panels to between 111.3 and 100.7 lbf.in (1.26 and 1.14 m.daN ) T.
5. Close-up
Subtask 72-23-00-410-107-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) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
     (a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
     (b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 72-23-00-440-065-A ** ON A/C NOT FOR ALL
B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041)
Subtask 72-23-00-410-108-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Close the fan cowls: (Ref. AMM TASK 71-13-00-410-040)
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (2) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 12:59:48 UTC
"Aviabrain" 2025