Blend Repair of the Left Thrust Reverser Blocker Door Drag Link Surface Damage - VRS2278 [IAE]

TASK 78-32-42-300-010-A
Blend Repair of the Left Thrust Reverser Blocker Door Drag Link Surface Damage - VRS2278

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

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	BRUSH - NYLON
No specific	AR	COTTON SWAB
No specific	AR	LIGHT SOURCE - HEAT, SPARK-PROOF
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-076)	Methyl Ethyl Ketone, Technical grade
(Material No.V05-073)	aluminum oxide abrasive paper
(Material No.V05-074)	aluminum oxide abrasive paper
(Material No.V06-131)	marking pen
(Material No.V07-028)	conversion coating
(Material No.V07-139)	thinner
(Material No.V07-140)	primer converter
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-31-00-710-041-A	Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02	Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
TASK 78-32-00-860-010-A	Manual Extension of the Thrust Reverser Translating Sleeves
TASK 78-32-00-860-011-A	Manual Retraction of the Thrust Reverser Translating Sleeves
Blocker Door Drag Link

3. Job Set-up
Subtask 78-32-42-941-055-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 78-32-42-010-063-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) in position.

Subtask 78-32-42-040-058-A ** ON A/C NOT FOR ALL

C. Deactivate the Thrust Reverser.

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 78-32-42-980-051-A ** ON A/C NOT FOR ALL

D. Manually extend the translating sleeve (Ref. AMM TASK 78-32-00-860-010).

Subtask 78-32-42-010-064-A ** ON A/C NOT FOR ALL

E. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

4. Procedure
Subtask 78-32-42-350-050-A ** ON A/C NOT FOR ALL

A. Remove the blocker door drag link surface damage.

Blocker Door Drag Link ** ON A/C NOT FOR ALL

(1) Use the aluminum oxide abrasive paper (Material No.V05-074) to remove the damaged area to a 10 to 1 taper.
(2) Use the aluminum oxide abrasive paper (Material No.V05-073) to polish the repair area and to make it smooth.

Subtask 78-32-42-110-050-A ** ON A/C NOT FOR ALL

B. Clean the Repair Area.
(1) Clean the repair area with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with V01-076Methyl Ethyl Ketone, Technical grade.
(2) Remove the cleaning fluid with a clean lint free cloth before it becomes dry.

Subtask 78-32-42-370-050-A ** ON A/C NOT FOR ALL

C. Apply the Conversion Coating.
(1) Mix the conversion coating (Material No.V07-028) , refer to the manufacturer's instructions.
(2) Use a BRUSH - NYLON or a COTTON SWAB to apply a layer of the conversion coating to the repair area.
(3) After three minutes, apply another layer of the conversion coating.
(4) Do steps (2) and (3) again until three layers of the conversion coating have been applied.
(5) Flush the surface of the last layer with clean water.
(6) Dry the surface.

Subtask 78-32-42-370-051-A ** ON A/C NOT FOR ALL

D. Apply the primer
(1) Mix the primer converter (Material No.V07-140) and the thinner (Material No.V07-139) , refer to the manufacturer's instructions.
(2) Use a brush to apply the primer to the repair surface.
(3) Cure the primer for 7 hours at room temperature or for forty minutes between 140 deg.F (60 deg.C) and 180 deg.F (82 deg.C) with an LIGHT SOURCE - HEAT, SPARK-PROOF.

NOTE: You can touch the primer after you have cured it as in step (3).
The primer is fully cured after 7 days at room temperature.

Subtask 78-32-42-210-052-A ** ON A/C NOT FOR ALL

E. Visually examine the complete repair to make sure that the necessary repair procedure has been done.

Subtask 78-32-42-350-051-A ** ON A/C NOT FOR ALL

F. Write VRS2278 adjacent to the assembly number on the translating sleeve to show that the repair has been done. Use a marking pen (Material No.V06-131) of a color which is different than the background.

5. Close-up
Subtask 78-32-42-410-060-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 halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 78-32-42-980-052-A ** ON A/C NOT FOR ALL

B. Manually retract the translating sleeve (Ref. AMM TASK 78-32-00-860-011).

Subtask 78-32-42-440-055-A ** ON A/C NOT FOR ALL

C. Activate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-440-012).

Subtask 78-32-42-410-061-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 78-32-42-710-052-A ** ON A/C NOT FOR ALL

E. Operational Test
(1) Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-041).

NOTE: As an alternative procedure, you can do the operational test without the CFDS (Ref. AMM TASK 78-31-00-710-041).

[Rev.10 from 2021] 2026.04.01 13:12:29 UTC