Visual Inspection of Strut 6 [CFML]

TASK 72-24-03-210-803-A
Visual Inspection of Strut 6

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.

ZONE: 400

1. Reason for the Job
This procedure gives criteria for visual inspection of strut 6.

NOTE: The inspection criteria below are applicable after removal of high metal.

NOTE: You can use equivalent alternatives for standard tools, equipment and consumable materials.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
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, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

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 72-24-03-000-803-A	Removal of the Strut 6
TASK 72-24-03-300-803-A	Strut 6 - Replacement of the Bonded Seals
TASK 72-24-03-400-803-A	Installation of the Strut 6
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Strut 6
Strut 6 Fairing Support

3. Job Set-up
Subtask 72-24-03-941-055-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 the 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 the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 72-24-03-010-060-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 72-24-03-040-055-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 ground maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 72-24-03-010-061-A

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.

4. Procedure
Subtask 72-24-03-210-052-A

A. Visual Inspection of Strut 6

Strut 6

(1) Do a visual inspection of all areas of strut 6 (1) . Refer to the table that follows for the inspection areas.

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Visual inspection of the area A
A.Grinding aspect	Any amount
B.Fretting, erosion, wear	Not serviceable
C.Nicks, scratches, cracks	Not serviceable
D.Dents	Not serviceable
2.Visual inspection of area B
A.Grinding aspect	Any amount
B.Fretting, erosion, wear	Not serviceable
C.Nicks, scratches, cracks	Not serviceable
D.Dents	Permitted, if not more than 0.024 in. (0.61 mm) in depth
3.Visual inspection of area C
A.Grinding aspect	Any amount
B.Fretting, erosion, wear	Not serviceable
C.Nicks, scratches, cracks	Permitted, if not more than 0.008 in. (0.20 mm) in depth
D.Dents	Permitted, if not more than 0.024 in. (0.61 mm) in depth
4.Visual inspection of the replaceable nuts (4)
A.Missing	Not serviceable	Replace the strut 6 (Ref. AMM TASK 72-24-03-000-803) and (Ref. AMM TASK 72-24-03-400-803).
B.Looseness	Not serviceable	Replace the strut 6 (Ref. AMM TASK 72-24-03-000-803) and (Ref. AMM TASK 72-24-03-400-803).
5.Visual inspection of the pawl springs (5)
A.Missing	Not serviceable	Replace the strut 6 (Ref. AMM TASK 72-24-03-000-803) and (Ref. AMM TASK 72-24-03-400-803).
B.Looseness	Not serviceable	Replace the strut 6 (Ref. AMM TASK 72-24-03-000-803) and (Ref. AMM TASK 72-24-03-400-803).
6.Visual inspection of the rivets (6)
A.Missing	Not serviceable	Replace the strut 6 (Ref. AMM TASK 72-24-03-000-803) and (Ref. AMM TASK 72-24-03-400-803).
B.Looseness	Not serviceable	Replace the strut 6 (Ref. AMM TASK 72-24-03-000-803) and (Ref. AMM TASK 72-24-03-400-803).
7.Visual inspection of the inserts (3)
A.Missing	Not serviceable	Replace the strut 6 (Ref. AMM TASK 72-24-03-000-803) and (Ref. AMM TASK 72-24-03-400-803).
B.Looseness	Not serviceable	Replace the strut 6 (Ref. AMM TASK 72-24-03-000-803) and (Ref. AMM TASK 72-24-03-400-803).
8.Visual inspection of the seals (2)
A.Missing fully or not	Not serviceable	Repair the bonded seal (Ref. AMM TASK 72-24-03-300-803).
B.Disbonded	Not serviceable	Repair the bonded seal (Ref. AMM TASK 72-24-03-300-803).
C.Break, crack, scratch, color change	Not serviceable	Repair the bonded seal (Ref. AMM TASK 72-24-03-300-803).
D.Bubbles	Not serviceable	Repair the bonded seal (Ref. AMM TASK 72-24-03-300-803).
E.Permanent strain, excessive strain	Not serviceable	Repair the bonded seal (Ref. AMM TASK 72-24-03-300-803).

Subtask 72-24-03-210-053-A

B. Visual Inspection of Strut 6 Fairing Support

Strut 6 Fairing Support

(1) Do a visual inspection of all areas of strut 6 fairing support (7). Refer to the table that follows for the inspection areas.

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Visual examination of all areas
A.Fretting, wear, erosion	Not serviceable
B.Nicks, scratches, cracks	Not serviceable
2.Visual inspection of area D
A.Dents	Any number if not more than 0.023 in. (0.58 mm) in depth
3.Visual inspection of area E
A.Dents	Not serviceable
4.Visual inspection of the replaceable nuts (8)
A.Missing	Not serviceable
B.Looseness	Not serviceable
C.Wear, torn	Not serviceable

5. Close-up
Subtask 72-24-03-410-057-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.

Subtask 72-24-03-440-054-A

B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 72-24-03-410-058-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 WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:04:01 UTC