Visual Inspection of the Front Spinner [CFML]

TASK 72-21-40-210-801-A
Visual Inspection of the Front Spinner

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
This procedure gives the criteria for the visual inspection of the front spinner.

NOTE: Remove the front spinner if necessary otherwise inspect the visible area only.

NOTE: The inspection criteria below are applicable after the removal of the 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. Referenced Information

REFERENCE	DESIGNATION
TASK 72-21-40-000-801-A	Removal of the Front Spinner
TASK 72-21-40-300-801-A	Front Spinner - Blending and Anodizing Spot Touch-up on Front Spinner Holes
TASK 72-21-40-400-801-A	Installation of the Front Spinner
Front Spinner

3. Job Set-up
Subtask 72-21-40-941-052-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 72-21-40-010-050-A

B. Get Access
(1) Remove the front spinner (Ref. AMM TASK 72-21-40-000-801).

4. Procedure
Subtask 72-21-40-210-050-A

A. Visual Inspection of the Front Spinner

Front Spinner

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1. Visual examination of all areas
A. Cracks	Not serviceable
B. Dents	Any number, up to: - 0.02 in. (0.5 mm) in depth - 0.20 in. (5.1 mm) in length A continue-in-service of 100 cycles or 150 hours is permitted if the deviation is up to: - 0.047 in. (1.2 mm) in depth - 0.47 in. (11.9 mm) in length.
C. Nicks	Any number, up to: - 0.020 in. (0.5 mm) in depth - 0.20 in. (5.1 mm) in length A continue-in-service of 100 cycles or 150 hours is permitted if the deviation is up to: - 0.047 in. (1.2 mm) in depth - 0.47 in. (11.9 mm) in length.
D. Scratches	Any number, up to: - 0.020 in. (0.5 mm) in depth - 0.20 in. (5.1 mm) in length A continue-in-service of 100 cycles or 150 hours is permitted if the deviation is up to: - 0.047 in. (1.2 mm) in depth - 0.47 in. (11.9 mm) in length.
E. Missing black paint	- 100 percent of missing black paint is permitted if no corrosion mark is seen (white mushroom pattern). - A continue-in-service of 100 cycles or 150 hours is permitted if a corrosion mark is seen.
F. Missing primer application	- 100 percent of missing primer application is permitted if no corrosion mark is seen (white mushroom pattern). - A continue-in-service of 100 cycles or 150 hours is permitted if a corrosion mark is seen.
G. Missing sulfuric anodizing	- 100 percent of missing sulfuric anodizing is permitted if no corrosion mark is seen (white mushroom pattern). - A continue-in-service of 100 cycles or 150 hours is permitted if a corrosion mark is seen.
2. Visual examination of area E
A. Dents	Any number, up to: - 0.0098 in. (0.25 mm) in depth - 0.0339 in. (0.86 mm) in length.
B. Nicks	Any number, up to: - 0.0098 in. (0.25 mm) in depth - 0.020 in. (0.5 mm) in length.
C. Scratches	Any number, up to: - 0.0055 in. (0.14 mm) in depth - 0.055 in. (1.4 mm) in length.
3. Visual examination of the area H
A. Erosion of parent material	Any amount, if dimension J is minimum dimension 0.150 in. (3.8 mm).
4. Visual examination of area B
A. Missing coating inner surfaces	Not serviceable
5. Visual examination of area B except contact faces with SHROUD, FRONT PLATFORM
A. Missing Primer	- 100 percent of missing primer application is permitted if no corrosion mark is seen (white mushroom pattern). - A continue-in-service 100 cycles or 150 hours is permitted if corrosion mark is seen.
B. Missing sulfuric anodizing	- 100 percent of missing sulfuric anodizing is permitted if no corrosion mark is seen (white mushroom pattern). - A continue-in-service 100 cycles or 150 hours is permitted if corrosion mark is seen.
6. Visual examination of area C
A. Missing white spiral-shaped mark	Permitted
7. Visual examination of diameter D
A. Contact marks of bolt threads	Any amount up to 0.003 in. (0.08 mm) in depth.
B. Corrosion	Not permitted.
8. Visual examination of area F
A. Dents	Any number, up to: - 0.020 in. (0.5 mm) in depth - 0.20 in. (5 mm) in length.	A continue-in-service of 100 cycles or 150 hours is permitted if the deviation is up to: - 0.047 in. (1.2 mm) in depth - 0.47 in. (12 mm) in length. See repair (Ref. AMM TASK 72-21-40-300-801).
B. Nicks	Any number, up to: - 0.020 in. (0.5 mm) in depth - 0.20 in. (5 mm) in length.	A continue-in-service of 100 cycles or 150 hours is permitted if the deviation is up to: - 0.047 in. (1.2 mm) in depth - 0.47 in. (12 mm) in length. See repair (Ref. AMM TASK 72-21-40-300-801).
C. Scratches	Any number, up to: - 0.020 in. (0.5 mm) in depth - 0.20 in. (5 mm) in length.	A continue-in-service of 100 cycles or 150 hours is permitted if the deviation is up to: - 0.047 in. (1.2 mm) in depth - 0.47 in. (12 mm) in length. See repair (Ref. AMM TASK 72-21-40-300-801).

5. Close-up
Subtask 72-21-40-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the front spinner (Ref. AMM TASK 72-21-40-400-801).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:51:52 UTC