Removal of the Left Thrust-Reverser Seals [PW11]

TASK 78-32-42-000-802-A
Removal of the Left Thrust-Reverser Seals

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: 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.

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	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	COVER - PROTECTION
No specific	1	SCRAPER - NON METALLIC

B. 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
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL

C. Referenced Information

REFERENCE	DESIGNATION
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 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-32-00-860-802-A	Manual Extension of the Thrust-Reverser Translating Sleeves
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
Inner-Fixed-Structure Fire Seals
Inner Fixed Structure Pressure Seals
Inner Fixed Structure Vapor Barrier Seals

3. Job Set-up
Subtask 78-32-42-941-061-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 78-32-42-010-076-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 2M (6 FT) - ADJUSTABLE in position.

Subtask 78-32-42-040-066-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 78-32-42-010-077-A ** ON A/C NOT FOR ALL

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

4. Procedure

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

Subtask 78-32-42-020-058-A ** ON A/C NOT FOR ALL

A. Removal of the Inner Fixed Structure Fire Seals

Inner-Fixed-Structure Fire Seals ** ON A/C NOT FOR ALL

(1) Remove the upper bifurcation fire seal (1).
(a) Cut the bond between the seal and the adjacent seal.
(b) Cut the bond between the seal and the adjacent structure.
(c) Remove the upper bifurcation fire seal (1) from the applicable seal retainers.
(d) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(2) Remove the upper intermediate case fire seal (2).
(a) Remove the pin (3) and nut (4) that attach the upper intermediate case fire seal (2) to the inner fixed structure.
(b) Cut the bond between the seal and the adjacent seals.
(c) Remove the upper intermediate case fire seal (2) from the applicable seal retainers.
(3) Remove the intermediate case fire seal (5).
(a) Cut the bond between the seal and the adjacent seal.
(b) Remove the intermediate case fire seal (5) from the applicable seal retainers.
(4) Remove the lower intermediate case fire seal (6).
(a) Cut the bond between the seal and the adjacent seal.
(b) Cut the bond between the seal and the adjacent structure.
(c) Remove the lower intermediate case fire seal (6) from the inner fixed structure.
(d) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(5) Remove the lower forward bifurcation fire seal (7).
(a) Cut the bond between the seal and the adjacent seal.
(b) Cut the bond between the seal and the adjacent structure.
(c) Remove the lower aft bifurcation fire seal (7) from the applicable seal retainer.
(d) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(6) Remove the firewall fire seal (8).
(a) Cut the bond between the seal and the firewall.
(b) Remove the firewall fire seal (8) from the seal retainer.
(c) Remove the remaining sealant from the firewall with a SCRAPER - NON METALLIC or equivalent.
(7) Remove the lower aft bifurcation fire seal (9).
(a) Cut the bond between the seal and the adjacent seal.
(b) Cut the bond between the seal and the adjacent structure.
(c) Remove the lower aft bifurcation fire seal (9) from the applicable seal retainers.
(d) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(8) Remove the ACOC inlet fire seal (10).
(a) Remove the 14 bolts (11) and 14 washers (12) that attach the ACOC inlet fire seal (10) to the inner fixed structure.
(b) Cut the bond between the seal and the adjacent structure.
(c) Remove the ACOC inlet fire seal (10) from the inner fixed structure.
(d) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.

Subtask 78-32-42-020-059-A ** ON A/C NOT FOR ALL

B. Removal of the Inner Fixed Structure Pressure Seals

Inner Fixed Structure Pressure Seals ** ON A/C NOT FOR ALL

(1) Remove the aft hinge beam seal (20).
(a) Remove the aft hinge beam seal (20) from the seal retainer.
(2) Remove the upper bifurcation seal (24).
(a) Cut the bond between the seal and the adjacent seal.
(b) Remove the upper bifurcation seal (24) from the applicable seal retainers.
(3) Remove the hinge beam seal (23).
(a) Remove the bolt (22) and nut (25) that attach the hinge beam seal (23) to the inner fixed structure.
(b) Remove the two bolts (21) and the two nuts (26) that attach the hinge beam seal (23) to the seal retainer support.
(c) Cut the bond between the seal and the adjacent seals.
(d) Cut the bond between the seal and the adjacent structure.
(e) Cut the bond between the seal and the seal retainer support.
(f) Remove the hinge beam seal (23) from the seal retainer and the seal retainer support.
(g) Remove the remaining sealant from the seal retainer support and inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(4) Remove the forward hinge beam seal (30).
(a) Remove the two bolts (31) and two nuts (27) that attach the forward hinge beam seal (30) to the seal retainer support.
(b) Remove the nut (27) that attaches the forward hinge beam seal (30) to the inner fixed structure.
(c) Remove the two bolts (29) that attach the forward hinge beam seal (30) and the forward outboard hinge beam seal (28) to the inner fixed structure.
(d) Cut the bond between the seal and the adjacent seal.
(e) Cut the bond between the seal, the seal retainer support and the retainer support.
(f) Cut the bond between the seal and the adjacent structure.
(g) Remove the forward hinge beam seal (30) from the seal retainer support, the retainer support and the inner fixed structure.
(h) Remove the remaining sealant from the seal retainer support, the retainer support and the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(5) Remove the forward outboard hinge beam seal (28).
(a) Cut the bond between the seal and the adjacent structure.
(b) Remove the forward outboard hinge beam seal (28) from the inner fixed structure.
(c) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(6) Remove the upper latch beam seal (33).
(a) Remove the three bolts (32) and the three nuts (36) that attach the upper latch beam seal (33) to the inner fixed structure.
(b) Cut the bond between the seal and the adjacent structure.
(c) Remove the upper latch beam seal (33) from the inner fixed structure.
(d) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(7) Remove the latch beam-fan case seal (34).
(a) Remove the four nuts (35) that attach the latch beam-fan case seal (34) to the inner fixed structure.
(b) Cut the bond between the seal and the adjacent structure.
(c) Remove the latch beam-fan case seal (34) from the inner fixed structure.
(d) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(8) Remove the forward latch beam seal (37).
(a) Remove the seven bolts (38) that attach the forward latch beam seal (37) to the seal retainer.
(b) Remove the forward latch beam seal (37) from the seal retainer.
(9) Remove the mid-latch beam seal (39).
(a) Remove the mid-latch beam seal (39) from the seal retainer.
(10) Remove the drain mast seal (40).
(a) Cut the bond between the seal and the adjacent seal.
(b) Cut the bond between the seal and the drain mast seal support.
(c) Remove the drain mast seal (40) from the seal retainer.
(d) Remove the remaining sealant from the drain mast seal support with a SCRAPER - NON METALLIC or equivalent.
(11) Remove the aft latch beam seal (41).
(a) Remove the aft latch beam seal (41) from the seal retainer.
(12) Remove the fairing latch beam seal (44).
(a) Remove the two bolts (45) and two bolts (43) that attach the fairing latch beam seal (44) to the latch beams.
(b) Cut the bond between the seal and the adjacent latch beams.
(c) Remove the fairing latch beam seal (44) from the latch beams.
(d) Remove the remaining sealant from the latch beams with a SCRAPER - NON METALLIC or equivalent.
(13) Remove the lower aft bifurcation seal (42).
(a) Remove the lower aft bifurcation seal (42) from the applicable seal retainers.
(14) Remove the gearbox breather seal (46).
(a) Remove the gearbox breather seal (46) from the seal retainer.
(15) Extension of translating sleeve.

CAUTION: DO NOT EXTEND THE THRUST REVERSER TRANSLATING SLEEVE MORE THAN 3.93 IN. (100 MM) WHEN THE THRUST REVERSER DOOR ON THE INBOARD SIDE IS OPEN. THE TRANSLATING SLEEVE CAN HIT THE SLATS AND CAUSE DAMAGE TO THE COMPONENTS.

(a) Manually extend the left thrust reverser translating sleeves a few inches or less to get access (Ref. AMM TASK 78-32-00-860-802).
(16) Remove the upper inner fixed structure bullnose seal (47).
(a) Remove the two nuts (48) that attach the upper inner fixed structure bullnose seal (47) to the inner fixed structure.
(b) Cut the bond between the seal and the adjacent structure.
(c) Remove the upper inner fixed structure bullnose seal (47) from the inner fixed structure.
(d) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.
(17) Remove the lower inner fixed structure bullnose seal (49).
(a) Remove the two nuts (50) that attach the lower inner fixed structure bullnose seal (49) to the inner fixed structure.
(b) Cut the bond between the seal and the adjacent structure.
(c) Remove the lower inner fixed structure bullnose seal (49) from the inner fixed structure.
(d) Remove the remaining sealant from the inner fixed structure with a SCRAPER - NON METALLIC or equivalent.

Subtask 78-32-42-020-060-A ** ON A/C NOT FOR ALL

C. Removal of the Inner Fixed Structure Vapor Barrier Seal

Inner Fixed Structure Vapor Barrier Seals ** ON A/C NOT FOR ALL

(1) Remove the vapor barrier seal (51).
(a) Remove the four nuts (52) that attach the vapor barrier seal (50) to the seal retainer support.
(b) Cut the bond between the seal and the seal retainer support.
(c) Cut the bond between the seal and the closeout bracket.
(d) Cut the bond between the seal and the adjacent seal.
(e) Remove the vapor barrier seal (51) from the seal retainer support.
(f) Remove the remaining sealant from the seal retainer support and the closeout bracket with a SCRAPER - NON METALLIC or equivalent.
(2) Installation of the protection covers

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(a) Make sure that you install COVER - PROTECTION as necessary to prevent damage to the engine.

[Rev.10 from 2021] 2026.04.01 03:33:18 UTC