Special Detailed Inspection (ROTO) of Pylon, Forward Lateral Spars, at Junction with Lower Spar, between RIB 1 and RIB 3, Attachment Bolt Holes, LH/RH

TASK 54-51-00-250-805-A
Special Detailed Inspection (ROTO) of Pylon, Forward Lateral Spars, at Junction with Lower Spar, between RIB 1 and RIB 3, Attachment Bolt Holes, LH/RH

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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

CAUTION: DO NOT APPLY TEMPORARY PROTECTION SYSTEM (TPS) ON THE INSPECTION AREA. IF YOU APPLY TPS ON THE INSPECTION AREA, YOU CAN CAUSE DAMAGE TO THE AIRCRAFT.

ZONE: 415
ZONE: 425
FIN: 4020KM1 ** ON A/C NOT FOR ALL
FIN: 4020KM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Refer to the MPD TASK: 545202-01
SPECIAL DETAILED INSPECTION (ROTO) OF PYLON, FORWARD LATERAL SPARS, AT JUNCTION WITH LOWER SPAR, BETWEEN RIB 1 AND RIB 3, ATTACHMENT BOLT HOLES, LH/RH.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	1	FLASHLIGHT
No specific	1	MIRROR - INSPECTION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
415	LOWER PYLON
425	LOWER PYLON
415AR, 425AR
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 51-78-00-916-001-A	Application of Temporary Protection System (TPS)
TASK 54-51-21-000-802-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-802-A	Installation of the Pylon Lateral Access-Doors
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-00-51-000-802-A	Removal of the Power Plant (Bootstrap Method)
TASK 71-00-51-000-802-A-01	Removal of the Power Plant (JacXson Method)
TASK 71-00-51-400-802-A	Installation of the Power Plant (Bootstrap Method)
TASK 71-00-51-400-802-A-01	Installation of the Power Plant (JacXson Method)
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
SRM 512300
SRM 512400
SRM 514200
NTM 545202
SRM 511100	(for corrective action)
SRM 512200	(for corrective action)
Attachment Bolt Holes at the Junction of the Forward Lateral Spars and the Lower Spar

3. Job Set-up
Subtask 54-51-00-941-116-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 54-51-00-040-113-A ** ON A/C NOT FOR ALL

B. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.

(1) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 54-51-00-010-123-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Open the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.
(3) Remove the power plant (Ref. AMM TASK 71-00-51-000-802).
(4) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 415
(b) For the right pylon, in zone 425.
(5) Remove the pylon lateral access-doors (Ref. AMM TASK 54-51-21-000-802):
(a) For the left pylon: 415AR
(b) For the right pylon: 425AR.

Subtask 54-51-00-110-114-A ** ON A/C NOT FOR ALL

D. Preparation of the Inspection Area
(1) Remove the fasteners to inspect the holes. Refer to the Structural Repair Manual ( SRM 514200).
(2) Remove the sealant and/or paint from the inspection area if this is necessary for the Non-destructive Testing Manual (NTM) task.
(3) Make sure that the inspection area is sufficiently clean to do a satisfactory inspection of the area.
(4) If it is not sufficiently clean, clean the inspection area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(5) Make sure that there is no Temporary Protection System (TPS) layer and if there is a TPS layer, remove it (Ref. AMM TASK 51-78-00-916-001).
(6) Use a FLASHLIGHT and a MIRROR - INSPECTION for the inspection, if necessary.

4. Procedure
Subtask 54-51-00-250-055-A ** ON A/C NOT FOR ALL

A. Inspection

Attachment Bolt Holes at the Junction of the Forward Lateral Spars and the Lower Spar ** ON A/C NOT FOR ALL

(1) Do a special detailed inspection (ROTO) of the attachment bolt holes at the junction of the forward lateral spars and the lower spar for damage or discontinuities. Do this inspection on the left and right sides. This inspection includes the area between RIB1 and RIB3. Refer to the Non-destructive Testing Manual ( NTM 545202).
(2) Make a report after the NTM inspection:
(a) Corrosion damage:

If you find corrosion, refer to the Structural Repair Manual ( SRM 512200) for the corrosion types, inspection, removal and subsequent corrosion protection.

(b) Other damage (scratches, cracks, gouges, dents, creases):

If you find this type of damage, refer to the Structural Repair Manual ( SRM 511100) for the damage types classification and corrective action.

5. Close-up
Subtask 54-51-00-910-051-A ** ON A/C NOT FOR ALL

A. Sealant or Paint Application
(1) Apply sealant ( SRM 512400) or paint ( SRM 512300) on the inspection area, if removed.

Subtask 54-51-00-420-086-A ** ON A/C NOT FOR ALL

B. Installation of the Components
(1) Refer to the installation drawing in the SRM identification section for the new fastener references.
(2) Install the fasteners of the inspected holes. Refer to the Structural Repair Manual ( SRM 514200).

Subtask 54-51-00-410-132-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the power plant (Ref. AMM TASK 71-00-51-400-802).
(3) Install the pylon lateral access-doors (Ref. AMM TASK 54-51-21-400-802):
(a) For the left pylon: 415AR
(b) For the right pylon: 425AR.
(4) Close the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.
(5) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.

Subtask 54-51-00-440-112-A ** ON A/C NOT FOR ALL

D. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 54-51-00-942-088-A ** ON A/C NOT FOR ALL

E. Aircraft Maintenance Configuration
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:00:08 UTC