Visually Examine the Pressure Seals of the Left Thrust Reverser [IAE]

TASK 78-32-49-200-013-A
Visually Examine the Pressure Seals of the Left 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 procedure for the inspection of the pressure seals of the left C-duct fixed structure.
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, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 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
CMM 783000
Pressure Seals

3. Job Set-up
Subtask 78-32-49-941-058-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 78-32-49-010-065-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 78-32-49-040-058-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 78-32-49-980-050-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 78-32-49-210-058-A ** ON A/C NOT FOR ALL

A. Visual Inspection:
(1) Examine the seals (21) and (22).

Pressure Seals ** ON A/C NOT FOR ALL

(2) Gouges less than 0.060 in. (1.52 mm) deep, accept it.
(3) Abrasions less than 0.0625 in. (1.59 mm) deep, accept it.
(4) Rips and tears less than 0.5 in. (12.7 mm) long, accept it.
(5) Gouges more than 0.060 in. (1.52 mm) deep, repair it (Ref. CMM 783000 Rep. 024, Replace Pressure Seal of C-DUCT Fixed Structure VRS2076/2077).
(6) Abrasions more than 0.0625 in. (1.59 mm) or any holes, repair it (Ref. CMM 783000 Rep. 024, Replace Pressure Seal of C-DUCT Fixed Structure VRS2076/2077).
(7) Rips/tears more than 0.5 in. (12.7 mm) long, repair it (Ref. CMM 783000 Rep. 024, Replace Pressure Seal of C-DUCT Fixed Structure VRS2076/2077).

Subtask 78-32-49-980-051-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-49-010-066-A ** ON A/C NOT FOR ALL

C. 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.

Subtask 78-32-49-210-059-A ** ON A/C NOT FOR ALL

D. Examine the seals (23) thru (32).

Pressure Seals ** ON A/C NOT FOR ALL

(1) Gouges less than 0.060 in. (1.52 mm) deep, accept it.
(2) Abrasions less than 0.0625 in. (1.59 mm) deep, accept it.
(3) Rips/tears less than 0.5 in. (12.7 mm) long, accept it.
(4) Gouges more than 0.060 in. (1.52 mm) deep, repair it (Ref. CMM 783000 Rep. 024, Replace Pressure Seal of C-DUCT Fixed Structure VRS2076/2077).
(5) Abrasions more than 0.0625 in. (1.59 mm) or any holes, repair it (Ref. CMM 783000 Rep. 024, Replace Pressure Seal of C-DUCT Fixed Structure VRS2076/2077).
(6) Rips/tears more than 0.5 in. (12.7 mm) long, repair it (Ref. CMM 783000 Rep. 024, Replace Pressure Seal of C-DUCT Fixed Structure VRS2076/2077).

5. Close-up
Subtask 78-32-49-410-065-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 78-32-49-440-058-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 78-32-49-410-066-A ** ON A/C NOT FOR ALL

C. 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 78-32-49-710-053-A ** ON A/C NOT FOR ALL

D. 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 03:28:55 UTC