Installation of the Centerbody [CFMI]

TASK 78-11-12-400-040-A
Installation of the Centerbody

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	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 240 and 220 lbf.in (2.71 and 2.49 m.daN )

B. Work Zones and Access Panels

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

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
10	NUTS	AIPC 71-00-00-02-210

D. Referenced Information

REFERENCE	DESIGNATION
TASK 72-56-00-210-001-A	Inspection/Check of the Turbine Frame Assembly
TASK 78-11-11-000-040-A	Removal of the Core Nozzle Assembly
TASK 78-11-11-400-040-A	Installation of the Core Nozzle Assembly
Centerbody

3. Job Set-up
Subtask 78-11-12-860-052-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).

Subtask 78-11-12-010-054-A ** ON A/C NOT FOR ALL

B. Make sure that the core nozzle is removed (Ref. AMM TASK 78-11-11-000-040).

4. Procedure
Subtask 78-11-12-420-052-A ** ON A/C NOT FOR ALL

A. Put the centerbody (30) on the studs in the engine flange.

NOTE: Due to interchangeability reasons between CFM56 5A and 5B engines some centerbodies have two rows of drain holes and can be installed in 5A engines.

Subtask 78-11-12-640-050-B ** ON A/C NOT FOR ALL

B. Not applicable

Subtask 78-11-12-420-053-B ** ON A/C NOT FOR ALL

C. Installation of the Centerbody
(1) Attach centerbody to the engine studs with new AIPC 71-00-00-02-210 NUTS (10) and washers (15).

NOTE: Make sure that you attach the centerbody to the engine with new nuts. Do not use nuts that were used before.

(2) Adjust the centerbody position to minimize flowpath mismatch.
(3) TORQUE nuts (10) to between 240 and 220 lbf.in (2.71 and 2.49 m.daN )

NOTE: If any anomaly occurs when removing nuts (loosing or broken stud), (Ref. AMM TASK 72-56-00-210-001) for serviceability or repair.

5. Close-up
Subtask 78-11-12-410-052-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) Install the core nozzle (Ref. AMM TASK 78-11-11-400-040).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:59:06 UTC