Installation of the Forward Acoustical Panels of the Fan [CFMI]

TASK 72-23-00-400-002-A
Installation of the Forward Acoustical Panels of the Fan

ZONE: 400
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	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 93 and 84 lbf.in (1.05 and 0.95 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS

D. Referenced Information

REFERENCE	DESIGNATION
TASK 72-23-00-280-025-A	Inspection of Forward Acoustical Panels
TASK 72-23-00-400-042-A	Installation of the Acoustical Panels Attachment Screw/Nut Locking
TASK 72-23-00-400-045-A	Installation of the Acoustical Panels Attachment Screw Locking
Fan Forward Acoustical Panel

3. Job Set-up
Subtask 72-23-00-860-051-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) pushbutton switch 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)-ADJUSTABLE is in position.

4. Procedure
Subtask 72-23-00-420-051-A ** ON A/C NOT FOR ALL

CAUTION: ENSURE BEFORE INSTALLATION THAT THE PS12 HOLE ON THE SKIN FILLET CORRESPONDS TO A PS12 PORT ON THE FORWARD CASE AND THAT THE SKIN FILLET DOES NOT COVER THE PS12 PORT.

A. Installation of the Fan Forward Acoustical Panels

NOTE: Forward acoustical panel assy is composed of the acoustical panel plus the 2 skin fillets. In case of a non-damaged skin fillet, these skin fillets can be reinstalled with the new acoustical panel.

(1) If necessary, assemble the 2 skin fillets (60) on the acoustical panel (70).

Fan Forward Acoustical Panel ** ON A/C NOT FOR ALL

CAUTION: COATING SCREWS IS MANDATORY.

(a) Apply a layer of graphite grease (Material No.CP2101) to the threads of all the screws that attach the acoustical panels and to the contact faces below the screw heads.
(2) Do a visual inspection of the forward acoustical panel cup (Ref. AMM TASK 72-23-00-280-025).
(3) If panel cup is found pierced (Ref. AMM TASK 72-23-00-400-045).

CAUTION: DO NOT EXCEED THE SPEED OF 200 RPM TO APPROACH ALL ACOUSTICAL PANEL SCREWS BY USING PNEUMATIC OR ELECTRICAL SCREW DRIVERS.

(4) Install the panel assy on the forward case, and attach it with 6 screws (80).

NOTE: Whenever possible, start to torque with the screws in the center of the acoustical panels.

(5) Measure the self-locking nut torque of each nut when you start to tighten the screw.

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 72-23-00-400-042).
(b) If the self-locking nut torque is between 4.5 lbf.in (0.05 m.daN) and 31 lbf.in (0.35 m.daN), TORQUE screws to between 93 and 84 lbf.in (1.05 and 0.95 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 screws at the running torque value and add 44 lbf.in (0.50 m.daN).
(d) If the self-locking nut torque is more than 49 lbf.in (0.55 m.daN), replace the self-locking nut (Ref. AMM D/O 72-23-00-30).

5. Close-up
Subtask 72-23-00-869-050-A ** ON A/C NOT FOR ALL

A. Make sure that the work area is clean and clear of tools and other items.

Subtask 72-23-00-942-050-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:33:41 UTC