Reactivation of the PTFE Strip on the Aft Core Cowl of the Thrust Reverser [CFML]

TASK 78-32-00-440-813-A
Reactivation of the PTFE Strip on the Aft Core Cowl of the Thrust Reverser

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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

1. Reason for the Job
CDL 78-68
6 O'clock Aft Core Cowl Teflon Strip
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	1	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL02069)	LINT-FREE COTTON CLOTH
(Material No.CPNCL02589)	GENERAL CLEANING AGENT - MULTI PURPOSE
(Material No.CPNCL02671)	tape - 3m type 433

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
TASK 78-32-49-960-803-A	Replacement of the PTFE Strip on the Aft Core Cowl of the Thrust Reverser (T/R) Right Hand (RH) Side
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Deactivation/Reactivation of the PTFE Strip on the Aft Core Cowl of the Thrust-Reverser

3. Job Set-up
Subtask 78-32-00-941-130-A

A. Safety Precautions
(1) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(2) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
The ENG/MASTER 1(2) control switch.

(3) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 78-32-00-010-216-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

Subtask 78-32-00-040-137-A

C. Deactivation of the Thrust Reverser System for Nacelle 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 nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 78-32-00-010-217-A

D. Get Access
(1) Open the right thrust reverser cowl-door (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

4. Procedure
Subtask 78-32-00-420-077-A

A. Reactivation of the PTFE Strip on the Aft Core Cowl

Deactivation/Reactivation of the PTFE Strip on the Aft Core Cowl of the Thrust-Reverser

(1) Install a temporary COVER - PROTECTION around the work area.
(2) Remove the tape - 3m type 433 (Material No.CPNCL02671) from the aft core cowl (1).
(3) Cleaning of the work area on the aft core cowl (1).
(a) Clean the work area on the aft core cowl (1) with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) made moist with GENERAL CLEANING AGENT - MULTI PURPOSE (Material No.CPNCL02589) .
(b) Dry the work area with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) before the solvent becomes gas.
(4) Install a new PTFE strip (Ref. AMM TASK 78-32-49-960-803).

5. Close-up
Subtask 78-32-00-410-205-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove a temporary COVER - PROTECTION around the work area.
(3) Remove the access platform(s).
(4) Close the right thrust reverser cowl-door (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

Subtask 78-32-00-440-129-A

B. Do the reactivation of the thrust reverser after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 78-32-00-410-206-A

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:35:39 UTC