Detailed Visual Inspection (DVI) of the Fan-Case Ice-Liner-Panel Segments [PW11]

TASK 72-21-03-220-801-A
Detailed Visual Inspection (DVI) of the Fan-Case Ice-Liner-Panel Segments

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE AND ENGINE OIL CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.

1. Reason for the Job
A. Use this procedure to do a Detailed Visual Inspection (DVI) of the fan-case ice-liner-panel segments. If you see damage, this procedure will reference you to a more Detailed Visual Inspection (DVI) for limits and dispositions.
B. Do not use this inspection if you think that the engine had a Foreign Object Damage (FOD) event or bird strike event, refer to TASK 72-00-00-210-80700 Visual Examination (After Bird Strike (Foreign Object Damage)).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	MAT - PROTECTIVE
636-1100-3GSE	1	INLET COWL PROTECT COVER

B. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 72-21-01-320-802-A	Repair the Fan Case Assembly Ice Liner Panel Segment Filler
Fan-Case Ice-Liner-Panel Segments

3. Job Set-up
Subtask 72-21-03-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833)

4. Procedure
Subtask 72-21-03-220-050-A ** ON A/C NOT FOR ALL

A. Detailed Visual Inspection (DVI) of the Fan-Case Ice-Liner-Panel Segments

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

(1) Put the 636-1100-3GSE INLET COWL PROTECT COVER or equivalent and the MAT - PROTECTIVE in the air inlet cowl.
(2) Do a visual inspection of the fan-case ice-liner-panel segments. See the table that follows:

EXAMINE	DAMAGE	DISPOSITION
For dents.	Any amount with smooth round bottoms that do not break the bond between the honeycomb material and the ice liner segment.	Permitted for continued service.
For cuts, cracks, gouges or tears.	Any cuts, cracks, gouges or tears in the ice liner segment.	Not permitted. Repair the ice liner-panel segment in 50 flight hours or less (Ref. AMM TASK 72-21-01-320-802) or replace the fan case (Ref. AMM TASK 72-21-01-000-801).
For broken adhesive bond.	Any amount up to 6 in.2 (3871 mm2) between the honeycomb material and the ice liner segment, where the ice liner segment does not extend into the airstream.	Not permitted. Repair the ice liner-panel segment in 50 flight hours or less (Ref. AMM TASK 72-21-01-320-802) or replace the fan case (Ref. AMM TASK 72-21-01-000-801).
	Any amount up to 6 in.2 (3871 mm2) between the honeycomb material and the ice liner segment, where the ice liner segment does not extend into the airstream.	Not permitted. Repair the ice liner-panel segment before the next flight (Ref. AMM TASK 72-21-01-320-802) or replace the fan case (Ref. AMM TASK 72-21-01-000-801).
Disbond.	Any amount between the fan case and the honeycomb material.	Not permitted. Repair the ice liner-panel segment before the next flight (Ref. AMM TASK 72-21-01-320-802) or replace the fan case (Ref. AMM TASK 72-21-01-000-801).

(3) In the areas where you can see object damage on the fan-case ice-liner-panel segments, do the tap test that follows to find the areas with bad or broken bond:
(a) Use a small piece of metal, such as a coin, to tap the area where there is damage and then tap the adjacent area.
(b) If there is a difference in the sound, there is delamination.
(4) Remove the MAT - PROTECTIVE from the inside of the air inlet cowl.
(5) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 72-21-03-860-050-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).

[Rev.8 from Aug 2017] 2026.04.01 02:48:41 UTC