Special Detailed Inspection (Endoscope) of Thrust Reverser, Forward Frame to Beam Junctions [CFML]

TASK 78-32-00-280-801-A
Special Detailed Inspection (Endoscope) of Thrust Reverser, Forward Frame to Beam Junctions

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.

ZONE: 400

1. Reason for the Job
Refer to the MPD TASK: 783224-01
SPECIAL DETAILED INSPECTION (ENDOSCOPE) OF THRUST REVERSER, FORWARD FRAME TO BEAM JUNCTIONS.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	BORESCOPE SET
No specific	1	LIGHT SOURCE - HIGHPOWER
No specific	1	MIRROR - INSPECTION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. 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 78-32-50-010-801-A	Manually Deploy the Translating Cowl
TASK 78-32-50-410-801-A	Manually Stow the Translating Cowl
Special Detailed Inspection (Endoscope) of Thrust Reverser, Forward Frame to Beam Junctions

3. Job Set-up
Subtask 78-32-00-941-117-A

A. Safety Precautions
(1) 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 a WARNING NOTICE(S) in position to tell persons not to operate:

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

(2) 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 78-32-00-010-173-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 78-32-00-040-116-A

C. Deactivation of the Thrust Reverser System for 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 78-32-00-010-174-A

D. Get Access
(1) Manually deploy the translating cowl (Ref. AMM TASK 78-32-50-010-801).
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

4. Procedure
Subtask 78-32-00-220-058-A

A. Special Detailed Inspection (Endoscope) of Thrust Reverser, Forward Frame to Beam Junctions

Special Detailed Inspection (Endoscope) of Thrust Reverser, Forward Frame to Beam Junctions

NOTE: This procedure is given for the left thrust reverser. It is also applicable to the right thrust reverser.

NOTE: You can use a MIRROR - INSPECTION and LIGHT SOURCE - HIGHPOWER.

(1) Make sure that the inspection area is sufficiently clean to do the inspection satisfactorily as per the specified inspection standards.
(2) Do the special detail inspection of the forward frame to upper beam junction:
(a) Do the inspection of the fasteners (3) on the rear part of the forward frame (1):
1 Make sure that there are no signs of corrosion.
2 If you find corrosion, contact Safran Nacelles.
(b) Do the inspection of the fasteners (5) that you can see in the internal cavity of the forward frame (1):
1 Put the BORESCOPE SET into the borescope access hole (6).
2 Make sure that there are no signs of corrosion.
3 If you find corrosion, contact Safran Nacelles.
(3) Do the special detailed inspection of the forward frame to lower beam junction:
(a) Do the inspection of the fasteners (7) on the rear part of the forward frame (1):
1 Make sure that there are no signs of corrosion.
2 If you find corrosion, contact Safran Nacelles.
(b) Do the inspection of the fasteners (9) and (10) that you can see in the internal cavity of the forward frame (1):
1 Put the BORESCOPE SET into the borescope access hole (11).
2 Make sure that there are no signs of corrosion.
3 If you find corrosion, contact Safran Nacelles.

5. Close-up
Subtask 78-32-00-410-161-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Manually stow the translating cowl (Ref. AMM TASK 78-32-50-410-801).

Subtask 78-32-00-440-108-A

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

Subtask 78-32-00-410-162-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 access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:35:47 UTC