Detailed Inspection of the "C" Duct Hinge Fittings and the Surrounding Structure [IAE]

TASK 78-32-00-210-826-A
Detailed Inspection of the "C" Duct Hinge Fittings and the Surrounding Structure

1. Reason for the Job
Refer to the MPD TASK: 783200-04
DETAILED INSPECTION OF "C" DUCT HINGE FITTINGS AND SURROUNDING 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	1	LIGHT SOURCE - INSPECTION
No specific	1	MAGNIFYING GLASS POWER 05X
No specific	1	MAGNIFYING GLASS POWER 10X
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

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

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
SRM 512200
Thrust Reverser Hinge and the Surrounding Structure

3. Job Set-up
Subtask 78-32-00-941-127-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(3) On 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) in position to tell persons not to energize FADEC 1(2).

Subtask 78-32-00-010-188-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 78-32-00-040-124-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).

4. Procedure

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

Subtask 78-32-00-210-112-A ** ON A/C NOT FOR ALL

A. Do a Detailed Visual Inspection (DVI) of the "C" Duct Hinge Fittings and the Surrounding Structure (150 mm around the hinge fitting).
(1) Remove the 11 screws (5) that attach the hinge panel (4) to the thrust reverser half (2).
(2) Remove the hinge access panel (4) from the thrust reverser half.
(3) Clean the inspection areas with a clean Textile-Lint free Cotton - (Material No.14SBA1) and cleaning fluid (Material No.V01-002) to remove the unwanted debris, dirt and grease.
(4) Remove the cleaning fluid (Material No.V01-002) before it becomes dry.
(5) Do a DVI of the "C" duct hinges and the surrounding structure. Use an LIGHT SOURCE - INSPECTION and a MAGNIFYING GLASS POWER 05X or a MAGNIFYING GLASS POWER 10X.
(a) Examine the "C" duct hinges and 150 mm (5.91 in.) of the adjacent structure from the edges of all hinges. Look for corrosion.
1 If you find corrosion please refer to SRM 512200 for types, inspection, removal and corrosion protection.
(6) After the inspection, put the hinge access panel (4) in position on the thrust reverser half.
(7) Attach the hinge access panel (4) with the 11 screws (5) to the thrust reverser half.
(8) TORQUE the screws (5) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )

5. Close-up
Subtask 78-32-00-410-193-A ** ON A/C NOT FOR ALL

A. Make sure that the work area is clean and clear of tools and other items.

Subtask 78-32-00-440-116-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-00-410-179-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 78-32-00-710-057-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 03:28:01 UTC