Inspection/Check of the Spinner Cone [CFMI]

TASK 72-21-00-210-001-A
Inspection/Check of the Spinner Cone

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
This section gives information on the non-destructive testing methods which are used for the inspection of the fan and booster assembly.
The inspection of the fan and booster assembly is possible during normal line maintenance. You can do it in different ways, depending on the location of the parts. The different modes of inspection and the parts to be inspected are as follows:
Visual inspection/check of the spinner, fan blades, fan disk and, through the fan blades, the stage 1 booster vanes.
Borescope inspection of booster blades (fully) and vanes (partially).

NOTE: The borescope procedure is given in the CFM56 Non-Destructive Test Manual (NDTM).

The borescope is used to do visual inspections and to take photographs of selected areas of the booster.
The booster areas that you can view are:
The leading and trailing edges of the stage 2 booster blades
The leading and trailing edges of the stages 3 and 4 booster blades.

NOTE: Stages 2, 3 and 4 apply to the booster rotor stages only.

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	1	MAT - PROTECTIVE
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2216)	Loctite 496

C. Referenced Information

REFERENCE	DESIGNATION
TASK 72-00-00-200-005-A	Over-Serviceable-Limit Extensions
TASK 72-21-00-000-001-A	Removal of the Spinner Front Cone
TASK 72-21-00-000-002-A	Removal of the Spinner Rear Cone
TASK 72-21-00-300-003-A	Replacement of the Crimped Self-locking Nuts on the Spinner Rear Cone
TASK 72-21-00-400-001-A	Installation of the Spinner Front Cone
TASK 72-21-00-400-002-A	Installation of the Spinner Rear Cone
TASK 72-55-00-960-001-A	Replacement of LPT Shaft Plug O-rings

3. Job Set-up
Subtask 72-21-00-941-060-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
(4) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.
(5) Install MAT - PROTECTIVE in the lower half of the inlet cowl.

Subtask 72-21-00-020-061-A ** ON A/C NOT FOR ALL

B. Removal of the spinner cones.
(1) Remove the spinner front cone (Ref. AMM TASK 72-21-00-000-001).
(2) Remove the spinner rear cone (Ref. AMM TASK 72-21-00-000-002).

4. Procedure
Subtask 72-21-00-210-050-A ** ON A/C NOT FOR ALL

A. Visualy inspect the following:

NOTE: Whenever serviceable limits for the following are exceeded, refer to the over-serviceable limit extension if necessary (Ref. AMM TASK 72-00-00-200-005).

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Spinner front cone for:
A.Cracks	Not serviceable.	Install a new or serviceable spinner front cone (Ref. AMM TASK 72-21-00-400-001).
B.Nicks, dents and scratches	No limited quantity
C.Damaged or missing surface protection for aluminum spinner front cone (POST CFM SB 72-0516).	No limit if not greater than 50 percent of total surface	If more than 50 percent of total surface, install a new or serviceable spinner front cone (Ref. AMM TASK 72-21-00-400-001).
D.Loose or missing bonded washer for kinel spinner front cone (PRE CFM SB 72-0516).	Not serviceable.	Reinstall washer using Loctite 496 (Material No.CP2216) and hold it in pressure until Loctite sets
E.Tip erosion.	No limit if radius is not greater than 0.28 in. (7.1 mm) after blending.	Do blending procedure to maximum serviceable limits or install a new or serviceable spinner front cone (Ref. AMM TASK 72-21-00-400-001)
F.Missing anti-erosion paint	Any amount is permitted.
2.Spinner rear cone for:
A.Cracks	Not serviceable	Install a new or serviceable spinner rear cone (Ref. AMM TASK 72-21-00-400-002)
B.Dents	No limited quantity
C.Damaged surface protection.	No limit if not greater than 10 percent of total surface	If more than 10 percent of total surface, install a new or serviceable spinner rear cone (Ref. AMM TASK 72-21-00-400-002).
D.Missing self-locking nuts	Not serviceable	Replace nuts (Ref. AMM TASK 72-21-00-300-003) or install a new or serviceable spinner rear cone (Ref. AMM TASK 72-21-00-400-002)
E.Self-locking nuts with loss of self-locking quality	Not serviceable if running torque is less than 4 lbf.in (0.05 m.daN)	Replace nuts (Ref. AMM TASK 72-21-00-300-003) or install a new or serviceable spinner rear cone (Ref. AMM TASK 72-21-00-400-002)
F.Self-locking nuts with axial looseness	Not more than 0.008 in. (0.2 mm)	Crimp again (no crack permitted) or replace nuts (Ref. AMM TASK 72-21-00-300-003)
G.Self-locking nuts with lateral looseness	Not more than 0.004 in. (0.1 mm)	Replace nuts (Ref. AMM TASK 72-21-00-300-003) or install a new or serviceable spinner rear cone (Ref. AMM TASK 72-21-00-400-002)
H.Oil wetting at inner of spinner cone or fan disk or forward fan shaft	None permitted	50 cycles extension allowed before O-ring change. Replace O-rings on the LPT shaft plug (Ref. AMM TASK 72-55-00-960-001)

5. Close-up
Subtask 72-21-00-420-061-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Installation of the spinner cones.
(a) Install the spinner rear cone (Ref. AMM TASK 72-21-00-400-002).
(b) Install the spinner front cone (Ref. AMM TASK 72-21-00-400-001).
(3) Remove the MAT - PROTECTIVE from the inlet cowl.
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:58:31 UTC