Detailed Inspection of the Nozzle Fire Finger Seals [PW11]

TASK 78-11-01-220-801-A
Detailed Inspection of the Nozzle Fire Finger Seals

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: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

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
Refer to the MPD TASK: 781000-W1
DETAILED INSPECTION OF NOZZLE FIRE FINGER SEALS.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	LIGHT SOURCE - INSPECTION
No specific	1	MAGNIFYING GLASS POWER 10X
No specific	1	MIRROR - INSPECTION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU1-0001)	cloth
(Material No.PU2-0001)	alcohol, isopropyl

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR, 473AL
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR, 483AL

D. Referenced Information

REFERENCE	DESIGNATION
TASK 54-57-22-000-810-A	Removal of the Rear Mount Fairing (RMF) Door
TASK 54-57-22-400-810-A	Installation of the Rear Mount Fairing (RMF) Door
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 78-11-01-000-802-A	Removal of the Exhaust Fire Seal
TASK 78-11-01-400-802-A	Installation of the Exhaust Fire Seal
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
SRM 512200
SRM 544100
Exhaust Fire Seal - Detailed Visual Inspection

3. Job Set-up
Subtask 78-11-01-941-055-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 78-11-01-010-065-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 the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 78-11-01-040-056-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System 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 78-11-01-010-066-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.

Subtask 78-11-01-010-067-A ** ON A/C NOT FOR ALL

E. Get Access
(1) On the pylon, open the following access panels (Ref. AMM TASK 54-57-22-000-810):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
473AL.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
483AL.

Subtask 78-11-01-110-050-A ** ON A/C NOT FOR ALL

F. Cleaning of the Exhaust Fire Seal and the Adjacent Structure
(1) Clean the exhaust fire seal, the attachment hardware and the adjacent structure with a clean cloth (Material No.PU1-0001) with PU2-0001alcohol, isopropyl or equivalent. Remove PU2-0001alcohol, isopropyl with a clean cloth (Material No.PU1-0001) before it dries.

4. Procedure

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

Subtask 78-11-01-220-050-A ** ON A/C NOT FOR ALL

A. Detailed Visual Inspection of the Exhaust Fire Seal
(1) Use the LIGHT SOURCE - INSPECTION, the MAGNIFYING GLASS POWER 10X and the MIRROR - INSPECTION and examine the exhaust fire seal on the exhaust nozzle. Look for missing segments, cracks, gouges and holes. If you find damage, replace the exhaust fire seal (Ref. AMM TASK 78-11-01-000-802) and (Ref. AMM TASK 78-11-01-400-802).
(2) Use the LIGHT SOURCE - INSPECTION and the MAGNIFYING GLASS POWER 10X and examine the bolts and washers that attach the exhaust fire seal to the exhaust nozzle. Look for corrosion, wear, cracks, gouges and missing hardware. If you find damage, replace the hardware (Ref. AMM TASK 78-11-01-000-802) and (Ref. AMM TASK 78-11-01-400-802).
(3) Make sure that the bolts and washers are correctly attached. Tighten or replace the part as necessary (Ref. AMM TASK 78-11-01-000-802) and (Ref. AMM TASK 78-11-01-400-802).
(4) Use the LIGHT SOURCE - INSPECTION and the MAGNIFYING GLASS POWER 10X and examine the structure adjacent to the exhaust fire seal. Look for dents, cracks, gouges, corrosion or wear.
(a) If you find corrosion damage, repair or replace the damaged component parts SRM 512200 or contact United Technologies, Aerospace Systems West.
(b) If you find other damage, look for damage limits and corrective action SRM 544100 or contact United Technologies, Aerospace Systems West.

5. Close-up
Subtask 78-11-01-410-056-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) On the pylon, close the access panels that follow (Ref. AMM TASK 54-57-22-400-810) :
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
473AL.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
483AL.
(3) 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 78-11-01-440-053-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 78-11-01-410-057-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 03:30:25 UTC