Replacement of the Inlet-Cone Nut Plates and Rivets [PW11]

TASK 72-11-01-960-801-A
Replacement of the Inlet-Cone Nut Plates and Rivets

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS 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: 400

1. Reason for the Job
Use this procedure to replace loose, missing or damaged nut plates and rivets on the inlet cone.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	MAT - PROTECTIVE
636-1100-3GSE	1	INLET COWL PROTECT COVER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P05-017)	wipers, cotton (Lint-Free)
(Material No.P11-014)	isopropyl alcohol
(Material No.P11-078)	alcohol, isopropyl

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	NUT PLATES	EIPC 72-11-01-01-160
2	RIVETS	EIPC 72-11-01-01-170

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-24-00-910-802-A	PWA 357 - Removal of Rivets
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
Replacement of the Nut Plates on the Inlet Cone

3. Job Set-up
Subtask 72-11-01-941-054-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).
(2) Put the 636-1100-3GSE INLET COWL PROTECT COVER or MAT - PROTECTIVE in the intake cowl.

4. Procedure
Subtask 72-11-01-960-050-A ** ON A/C NOT FOR ALL

A. Replacement of the Inlet-Cone Nut Plates and Rivets

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

CAUTION: THIS AIRCRAFT MAINTENANCE MANUAL REPAIR LETS YOU REPLACE ONLY THE ORIGINAL EQUIPMENT MANUFACTURER'S NUT PLATES AND RIVETS. IF THERE IS DAMAGE TO THE RIVET HOLES OR PARTS, THEN YOU MUST NOT DO THE REPAIR ON-WING. YOU MUST REMOVE AND REPAIR THE PART AS PER THE APPLICABLE CLEANING, INSPECTION & REPAIR MANUAL.

CAUTION: BE CAREFUL WHEN YOU MACHINE THE RIVET HEAD. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE RIVET HOLE OR THE PART FROM WHICH IT IS REMOVED CAN OCCUR.

(1) Find the inlet cone located on the fan rotor.
(2) Remove the inlet cone, if necessary (Ref. AMM TASK 72-11-01-000-801).
(3) Remove the damaged nut plates (1) as follows:

Replacement of the Nut Plates on the Inlet Cone ** ON A/C NOT FOR ALL

NOTE: If the nut plates (1) and the rivets (2) are all loose and you have access to them, replace all of them. Make sure you remove all the necessary external attachments to help in the removal and installation of the nut plates (1) and the rivets (2).

(a) Drill out the rivet (2) heads that attach the nut plates (1) to the front flange of the inlet cone (Ref. AMM TASK 70-24-00-910-802).
(b) Hold the rivet (2) upset head while you drill to prevent the rivet (2) spin.
(c) If the manufactured head does not remove from the shank after you drill, increase the drill bit size in increments until the manufactured head is removed.
(d) Remove the nut plates (1).
(4) Clean the rivet (2) holes and surface with P05-017wipers, cotton (Lint-Free) made moist with isopropyl alcohol (Material No.P11-014) or P11-078alcohol, isopropyl.
(5) Examine the rivet (2) holes and surface below the removed nut plates (1):
(a) Do a visual inspection for cracks, delamination or surface damage.
1 No cracks, delamination or surface damage is permitted.
(6) Install the new EIPC 72-11-01-01-160 NUT PLATES (1) in the correct location on the front flange of the inlet cone as follows:
(a) Install the nut plate (1) at no more than five locations at G.
(b) Install the rivet (2) at no more than ten locations at G. Select the length as necessary from the same diameter listing on the rivet (2) inspection.
(c) Install the rivets (2) (Ref. AMM TASK 70-24-00-910-802).

NOTE: Thr oversized rivets (2) are not permitted.

NOTE: You must support the composite flange when you upset the rivet (2) head. Make sure that the rivet (2) tool is positioned to prevent laminate damage around the rivet (2) hole.

(d) Examine the rivets (2) for cracks, clearance and correct installation (Ref. AMM TASK 70-24-00-910-802).

NOTE: If the rivets (2) are not in the above limits, remove and replace the EIPC 72-11-01-01-170 RIVETS (2) with new ones.

(7) Install the inlet cone, if necessary (Ref. AMM TASK 72-11-01-400-801).
(8) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 72-11-01-942-050-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Remove the 636-1100-3GSE INLET COWL PROTECT COVER and MAT - PROTECTIVE.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:02:14 UTC