Visual Inspection of the Accessory Gearbox (AGB) Link [CFML]

TASK 72-23-06-210-801-A
Visual Inspection of the Accessory Gearbox (AGB) Link

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.

1. Reason for the Job
Self explanatory
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
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
Accessory Gearbox (AGB) Link

3. Job Set-up
Subtask 72-23-06-941-052-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 72-23-06-010-052-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

4. Procedure
Subtask 72-23-06-210-050-A

A. Visual Inspection of the Accessory Gearbox (AGB) Link

Accessory Gearbox (AGB) Link

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Do the visual inspection of the links (axial link assembly (1), link assembly (2)) as follows:
A.All area for:
(1)Corrosion	Not serviceable
B.Coupling rod assembly interface between coupling rod and spherical bearing
(1)Axial and radial play	Not serviceable
C.Coupling rod assembly interface between coupling rod and spherical bearing
(1)Seized-up	Not serviceable
2.Do the visual inspection of the stirrup assembly (3) as follows:
A.All area for:
(1)Corrosion	Not serviceable
B.Coupling rod assembly interface between coupling rod and spherical bearing
(1)Axial and radial play	Not serviceable
C.Coupling rod assembly interface between coupling rod and spherical bearing
(1)Seized-up	Not serviceable
3.Do the visual inspection of the lug (accessory gearbox assembly housing lug (5), axial lug (6) and accessory gearbox assembly mounting lug (7)) as follows:
A.All area for:
(1)Missing protective coating	Not serviceable
(2)Corrosion	Not serviceable
B.Lug damper bearings
(1)Cracks	Not serviceable
(2)Elastomer crumbling	Not serviceable
(3)If the damper does not touch the support pin abutment face	Not serviceable
(4)Pitted or galled	Not serviceable
(5)Axial and radial play	Not serviceable
(6)Loose or missing	Not serviceable
C.Inner bores for:
(1)Fretting	Not serviceable

5. Close-up
Subtask 72-23-06-410-051-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) 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
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:52:29 UTC