Replacement of the Fan Hub Clinch Nut [PW11]

TASK 72-11-06-960-801-A
Replacement of the Fan Hub Clinch Nut

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 430
ZONE: 440

1. Reason for the Job
Use this procedure to replace clinch nut(s) on the fan hub.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	FEELER - STOCK
PWA105276	1	FLARING TOOL, MECHANICAL

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
430	ENG 1 AIR INTAKE, FAN AND ACCESS GEARBOX
440	ENG 2 AIR INTAKE, FAN AND ACCESS GEARBOX

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	CLINCH NUT	EIPC 72-11-00-01-050

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 72-11-01-000-801-A	Removal of the Inlet Cone
TASK 72-11-01-400-801-A	Installation of the Inlet Cone
Fan-Hub Clinch Nut Replacement

3. Job Set-up
Subtask 72-11-06-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833)

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 72-11-06-960-050-A ** ON A/C NOT FOR ALL

A. Replacement of the Fan-Hub Clinch Nut
(1) Remove the inlet cone (Ref. AMM TASK 72-11-01-000-801).

CAUTION: WHEN YOU MACHINE THE CLINCH NUT, BE CAREFUL NOT TO MAKE THE DIAMETER OF THE FAN HUB HOLE LARGER. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE FAN HUB CAN OCCUR.

CAUTION: ONLY USE AN ALUMINUM, BRASS OR COMPOSITE DRIFT TO REMOVE THE REMAINING MATERIAL OF THE CLINCH NUT. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN CAUSE DAMAGE TO THE FAN HUB.

(2)

Fan-Hub Clinch Nut Replacement ** ON A/C NOT FOR ALL

NOTE: It is recommended to use an aluminum, brass or composite drift.

(3) Visually inspect the EIPC 72-11-00-01-050 CLINCH NUT (2) hole for nicks, dents and scratches. No damage is permitted in the holes.
(4) Install the new EIPC 72-11-00-01-050 CLINCH NUT (2) in the correct location as follows:
(a) Attach the EIPC 72-11-00-01-050 CLINCH NUT (2) with the PWA105276 FLARING TOOL, MECHANICAL.

NOTE: The maximum permitted distance (1) between the EIPC 72-11-00-01-050 CLINCH NUT (2) and the hub is 0.010 in. (0.254 mm).

(b) Make sure the EIPC 72-11-00-01-050 CLINCH NUT (2) is tight against the hub with the 0.010 in. (0.254 mm) FEELER - STOCK.
(5) Install the inlet cone (Ref. AMM TASK 72-11-01-400-801).
(6) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 72-11-06-942-050-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:48:11 UTC