Attachment Components (In-Service Wear Limits) - Air Cycle Machine

TASK 21-52-21-200-001-A
Attachment Components (In-Service Wear Limits) - Air Cycle Machine

FIN: 10HM1
FIN: 11HM1

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 21-52-00-300-001-A	Attachment Components - Repair/Replacement
Attachment Components

3. Job Set-up
Subtask 21-52-21-860-052-A

A. Aircraft Maintenance Configuration
(1) Make sure that the applicable components are disassembled to do the inspection procedure.

4. Procedure
Subtask 21-52-21-210-051-A

A. Visual Inspection of the Spherical Bearings in the Support Rods
(1) On the support rods (74), (75), (78) and (79):
(a) Use an applicable measurement method and do a check for radial play at the spherical bearings (1).
(b) If you find more than 0.05 mm (0.0020 in.) radial play, or more than 0.2 mm (0.0079 in.) axial play in a spherical bearing (1) then you must replace the related rod eye-end (Ref. AMM TASK 21-52-00-300-001).

Subtask 21-52-21-220-050-A

B. In-Service Wear Limits
(1) Use applicable measurement equipment and measure the outside diameter (OD) of the bushing (22) and the inside diameter (ID) of the shouldered bushing (3).

NOTE: If any of the components are 'out of limits' then you must replace them.

for item (3) (Ref. AMM TASK 21-52-00-300-001).

FIG. DETAIL AND ITEM N°	ORIGINAL MANUFACTURING LIMITS	IN-SERVICE WEAR LIMITS
BB	8.986	8.995			8.979
OD 22	(0.3538)	(0.3541)			(0.3535)
			0.0050	0.0290			0.0430
			(0.0002)	(0.0011)			(0.0017)
BB	9.000	9.015				9.022
ID 3	(0.3543)	(0.3549)				(0.3552)

Subtask 21-52-21-220-051-A

C. In-Service Wear Limits
(1) Use applicable measurement equipment and measure the OD of the bolt (24) and the ID of the bushing (22).

NOTE: If any of the components are 'out of limits' then you must replace them.

FIG. DETAIL AND ITEM N°	ORIGINAL MANUFACTURING LIMITS	IN-SERVICE WEAR LIMITS
BB	6.325	6.335			6.318
OD 24	(0.2490)	(0.2494)			(0.2487)
			0.0150	0.0400			0.0540
			(0.0006)	(0.0016)			(0.0021)
BB	6.350	6.365				6.372
ID 22	(0.2500)	(0.2506)				(0.2509)

Subtask 21-52-21-220-052-A

D. In-Service Wear Limits
(1) Use applicable measurement equipment and measure the OD of the bolt (24) and the ID of the shouldered bushing (2).

NOTE: If any of the components are 'out of limits' then you must replace them.

for item (2) (Ref. AMM TASK 21-52-00-300-001).

FIG. DETAIL AND ITEM N°	ORIGINAL MANUFACTURING LIMITS	IN-SERVICE WEAR LIMITS
BB	6.325	6.335			6.318
OD 24	(0.2490)	(0.2494)			(0.2487)
			0.0150	0.0350			0.0490
			(0.0006)	(0.0014)			(0.0019)
BB	6.350	6.360				6.367
ID 2	(0.2500)	(0.2504)				(0.2507)

Subtask 21-52-21-220-053-A

E. In-Service Wear Limits
(1) Use applicable measurement equipment and measure the OD of the bushing (22) and the ID of the shouldered bushing (5).

NOTE: If any of the components are 'out of limits' then you must replace them.

for item (5) (Ref. AMM TASK 21-52-00-300-001).

FIG. DETAIL AND ITEM N°	ORIGINAL MANUFACTURING LIMITS	IN-SERVICE WEAR LIMITS
CC	8.986	8.995			8.979
OD 22	(0.3538)	(0.3541)			(0.3535)
			0.0050	0.0290			0.0430
			(0.0002)	(0.0011)			(0.0017)
CC	9.000	9.015				9.022
ID 5	(0.3543)	(0.3549)				(0.3552)

Subtask 21-52-21-220-054-A

F. In-Service Wear Limits
(1) Use applicable measurement equipment and measure the OD of the bolt (24) and the ID of the bushing (22).

NOTE: If any of the components are 'out of limits' then you must replace them.

FIG. DETAIL AND ITEM N°	ORIGINAL MANUFACTURING LIMITS	IN-SERVICE WEAR LIMITS
CC	6.325	6.335			6.318
OD 24	(0.2490)	(0.2494)			(0.2487)
			0.0150	0.0400			0.0540
			(0.0006)	(0.0016)			(0.0021)
CC	6.350	6.365				6.372
ID 22	(0.2500)	(0.2506)				(0.2509)

Subtask 21-52-21-220-055-A

G. In-Service Wear Limits
(1) Use applicable measurement equipment and measure the OD of the bolt (24) and the ID of the shouldered bushing (4).

NOTE: If any of the components are 'out of limits' then you must replace them.

for item (4) (Ref. AMM TASK 21-52-00-300-001).

FIG. DETAIL AND ITEM N°	ORIGINAL MANUFACTURING LIMITS	IN-SERVICE WEAR LIMITS
CC	6.325	6.335			6.318
OD 24	(0.2490)	(0.2494)			(0.2487)
			0.0150	0.0350			0.0490
			(0.0006)	(0.0014)			(0.0019)
CC	6.350	6.360				6.367
ID 4	(0.2500)	(0.2504)				(0.2507)

[Rev.10 from 2021] 2026.04.02 06:48:38 UTC