Removal of the Aft Acoustical Panel [CFML]

TASK 72-23-04-000-801-A
Removal 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.

ZONE: 210
ZONE: 400

1. Reason for the Job
Self explanatory
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)
956A7616	1	MAT, PROTECTION - INLET COWL

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2734)	RTV103

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
400	POWER PLANT, NACELLES AND PYLONS

D. Referenced Information

REFERENCE	DESIGNATION
TASK 72-21-20-000-801-A	Removal of the Fan Blades
TASK 72-21-40-000-801-A	Removal of the Front Spinner
Aft Acoustical Panel

3. Job Set-up
Subtask 72-23-04-941-051-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 72-23-04-010-053-A

B. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(2) Install the 956A7616 MAT, PROTECTION - INLET COWL on the inlet cowl.
(3) Remove the front spinner (Ref. AMM TASK 72-21-40-000-801).

4. Procedure

WARNING: WHEN YOU REMOVE/INSTALL THE AFT ACOUSTIC PANEL, BE CAREFUL NOT TO HIT THE T12 SENSOR. IF YOU DO, THE T12 SENSOR CAN CAUSE INJURY TO YOU.

Subtask 72-23-04-000-050-A

A. Removal of the Aft Acoustical Panel

Aft Acoustical Panel

NOTE: This procedure gives the instructions to remove one aft acoustical panel (1). It is also applicable to the other aft acoustical panels (1).

(1) Remove the fan blades (Ref. AMM TASK 72-21-20-000-801).

WARNING: USE EYE PROTECTION WHEN YOU CUT MATERIAL OR PARTS. THE PARTICLES CAN CAUSE DAMAGE TO YOUR EYES.

WARNING: BE CAREFUL WHEN YOU USE SHARP OR POINTED TOOLS. THESE TOOLS CAN CAUSE AN INJURY TO YOU.

CAUTION: DO NOT USE A SHARP TOOL TO REMOVE THE ACOUSTIC PANELS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE ACOUSTIC PANELS OR THE FAN BOOSTER CAN OCCUR.

(2) If RTV103 (Material No.CP2734) is visible, carefully cut and remove it from the aft acoustical panel (1).
(3) Remove the three bolts (3) that attach the aft acoustical panel (1) to the fan case (5).
(4) Remove the three bolts (2) that attach the aft acoustical panel (1) to the fan frame shroud (4).
(5) Remove the aft acoustical panel (1) from the engine.
(6) Do steps 4.A.(1) thru 4.A.(4) to remove the remaining five aft acoustical panels (1).

[Rev.10 from 2021] 2026.04.01 02:52:24 UTC