Visually Examine the Surface Damage on the Blocker Door Drag Link of the Right Thrust Reverser [IAE]

TASK 78-32-72-200-010-A
Visually Examine the Surface Damage on the Blocker Door Drag Link of the Right Thrust Reverser

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

1. Reason for the Job
This task gives the data for a visual inspection of the surface damage on the blocker door drag link of the right thrust reverser.
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	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. 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
TASK 78-32-72-300-010-A	Blend Repair of the Right Thrust Reverser Blocker Door Drag Link Surface Damage - VRS2280
Blocker Door Drag Link

3. Job Set-up
Subtask 78-32-72-941-050-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 78-32-72-010-050-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 to position.

Subtask 78-32-72-040-050-A ** ON A/C NOT FOR ALL

C. Deactivation of the thrust:

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 78-32-72-010-051-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-72-010-052-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 78-32-72-210-050-A ** ON A/C NOT FOR ALL

A. Examination of the Surface Damage:

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

(1) Examine the blocker door drag link
(a) Abrasion/gouge (zones 1, 2, 3, and 4)
1 Less than 0.40 in. (10.16 mm) long by 0.03 in. (0.76 mm) wide by 0.02 in. (0.51 mm) deep in zones 1, 2, 3, 4, accept it.
2 Larger than 0.4 in. (10.16 mm) long by 0.03 in. (0.76 mm) wide and up to a maximum of 0.02 in. (0.51 mm) deep in zones 1, 2, 3 or 4, repair it (Ref. AMM TASK 78-32-72-300-010).
3 If the abrasion/gouge is more than 0.02 in. (0.51 mm) in depth in zone 4, reject it.
4 If the abrasion/gouge is more than 0.02 in. (0.51 mm) in depth in zones 1, 2, or 3 Ref. (2). Examine the abrasions/gouges which are more than 0.02 in. (0.51 mm) in depth (zones 1, 2, and 3).
(2) Examine the abrasions/gouges which are more than 0.02 in. (0.51 mm) in depth (zones 1, 2, and 3)
(a) Abrasion/gouge (zones 1, 2, and 3)
1 Remaining material thickness of between 0.165 in. (4.19 mm) and 0.170 in. (4.32 mm), repair it (Ref. AMM TASK 78-32-72-300-010).
2 Remaining material thickness of less than Ref. 1_, reject it.
(b) Abrasion/gouge one side of link only (zone 2)
1 Maximum of 0.125 in. (3.17 mm) deep. Not deeper than half the original material thickness, repair it (Ref. AMM TASK 78-32-72-300-010).
2 Deeper than Ref. 1_, reject it.
(c) Abrasive/gouge one side of link only (zone 3)
1 Maximum of 0.125 in. (3.17 mm) deep. Maximum blend depth of 0.127 in. (3.22 mm),repair it (Ref. AMM TASK 78-32-72-300-010).
2 Deeper than Ref. 1_, reject it.

5. Close-up
Subtask 78-32-72-410-050-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 right thrust reverser half (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
452AR.
(b) FOR [1000EM2] (ENGINE-2)
462AR.

Subtask 78-32-72-410-051-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-72-440-050-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 78-32-72-410-052-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 78-32-72-710-050-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 03:29:23 UTC