Replacement of the Nut Plates and the Rivets of the Fan Exit Liner Segments [PW11]

TASK 72-21-08-300-801-A
Replacement of the Nut Plates and the Rivets of the Fan Exit Liner Segments

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.

CAUTION: WHEN YOU DRILL THE RIVET HEAD, BE CAREFUL NOT TO CAUSE DAMAGE TO THE RIVET HOLE OR THE PART FROM WHICH YOU REMOVE IT.

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.

ZONE: 450
ZONE: 460

1. Reason for the Job
Use this procedure to repair loose, missing, or damaged nut plates and rivets on the fan exit liner segment.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	1	GUN - RIVET

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
450	ENG 1 THRUST REVERSER & EXHAUST SECTION
460	ENG 2 THRUST REVERSER & EXHAUST SECTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	NUT PLATE(S)	EIPC 72-21-00-03-320
2	RIVET(S)	EIPC 72-21-00-03-340

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-24-00-910-802-A	PWA 357 - Removal of Rivets
TASK 70-27-00-910-804-A	SPOP 208 - Degreasing of Parts by Solvent Wiping
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 72-21-08-000-801-A	Removal of the Fan Exit Liner Segments
TASK 72-21-08-400-801-A	Installation of the Fan Exit Liner Segments
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Fan Exit Liner Segment - Nut Plate(s) and Rivet(s) Replacement

3. Job Set-up
Subtask 72-21-08-941-052-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).

Subtask 72-21-08-010-056-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.

Subtask 72-21-08-040-053-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Ground Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 72-21-08-010-057-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

4. Procedure
Subtask 72-21-08-320-050-A ** ON A/C NOT FOR ALL

A. Replacement of the Nut Plates and the Rivets of the Fan Exit Liner Segments

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

(1) Remove the damaged liner (Ref. AMM TASK 72-21-08-000-801). See Sheet 1 of the figure

Fan Exit Liner Segment - Nut Plate(s) and Rivet(s) Replacement ** ON A/C NOT FOR ALL

(2) Remove the damaged nut plate (1) as follows:
(a) Drill out the rivet (2) heads that attach the nut plate (1) to the liner surface (Ref. AMM TASK 70-24-00-910-802).
(b) Push out the remaining rivet (2) shanks with the correct size drift. Be careful not to cause delamination around the hole.
(c) Remove the nut plate (1).
(3) Clean the rivet (2) holes and liner surface by SPOP 208 (Ref. AMM TASK 70-27-00-910-804).
(4) Examine the rivet (2) holes and surface below the removed nut plate (1) as follows:
(a) Do a visual inspection for cracks, delamination or surface damage. No cracks, delamination or surface damage is permitted.
(b) Do a dimensional inspection of the rivet (2) holes. See Sheets 2 and 3 of the figure

Fan Exit Liner Segment - Nut Plate(s) and Rivet(s) Replacement ** ON A/C NOT FOR ALL

(5) Installation of the new nut plate(s) (1).

CAUTION: MAKE SURE THAT THE RIVETING TOOL IS IN THE CORRECT POSITION TO PREVENT DAMAGE TO THE LAMINATE AROUND THE RIVET HOLE.

(a) Use a GUN - RIVET to install the new 72210003-320NUT PLATE(S)1. See Sheets 2 and 3 of the figure

Fan Exit Liner Segment - Nut Plate(s) and Rivet(s) Replacement ** ON A/C NOT FOR ALL

(6) Do an inspection of the rivets (2) as follows:
(a) Do a visual inspection for cracks, gaps, and correct installation.
1 No cracks are permitted in the manufactured head of the rivet (2).
2 No cracks are permitted in the upset head of the rivet (2).
3 No gaps are permitted in the manufactured head or the upset head of the rivet (2).
(b) Do a dimensional inspection of the rivets (2). See Sheets 2 and 3 of the figure

Fan Exit Liner Segment - Nut Plate(s) and Rivet(s) Replacement ** ON A/C NOT FOR ALL

1 The upset head diameter must be 0.118 in. (3.00 mm) - 0.140 in. (3.56 mm).
2 The upset head height must be 0.047 in. (1.19 mm) - 0.094 in. (2.39 mm).
(c) If the rivet(s) (2) are not within the limits, remove and replace the 72210003-340RIVET(S)2 the with new ones.
(7) Install the repaired liner (Ref. AMM TASK 72-21-08-400-801).
(8) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 72-21-08-410-053-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) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

Subtask 72-21-08-440-052-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 72-21-08-410-054-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:02:45 UTC