Visual Inspection of the Accessory Gearbox (AGB) Sleeve of Line 5 without Special Equipment [CFML]

TASK 72-63-12-210-801-A
Visual Inspection of the Accessory Gearbox (AGB) Sleeve of Line 5 without Special Equipment

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
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
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 79-21-05-000-804-A	Removal of the Lubrication Unit
TASK 79-21-05-400-804-A	Installation of the Lubrication Unit
Visual Inspection of the Accessory Gearbox (AGB) Sleeve of Line 5

3. Job Set-up
Subtask 72-63-12-941-051-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 WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
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 72-63-12-010-051-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
(2) Remove the splined sleeve assembly (Ref. AMM TASK 79-21-05-000-804).

4. Procedure
Subtask 72-63-12-210-051-A

A. Visual Inspection of the AGB Sleeve of Line 5
(1) Do a visual inspection of the splined sleeve assembly of AGB Line 5. Refer to the table below for the inspection criteria:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Examine all areas of the splined sleeve assembly for:
A.Cracks	Not serviceable
B.Missing protective coating	Any amount that does not exceed 5 percent of inner and outer surface area exclusive of splines.
C.Corrosion	Not serviceable
D.Heat discoloration	Accept bright polished steel to straw color. Accept blue color if discoloration disappears after cleaning.
E.Coked oil deposit	Accept if disappears after cleaning.
2.Examine the splines for:
A.Dents, nicks, burrs	Any amount that is not felt with 0.03 in. (0.76 mm) radius scriber
B.Wear	Any amount that is not felt with 0.03 in. (0.76 mm) radius scriber
C.Scratches	Any amount that is not felt with 0.03 in. (0.76 mm) radius scriber
3.Examine the level cup for:
A.Missing or loose	Not serviceable

5. Close-up
Subtask 72-63-12-410-051-A

A. Close Access
(1) Install the splined sleeve assembly (Ref. AMM TASK 79-21-05-400-804).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) 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
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:54:54 UTC