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

TASK 72-21-01-220-803-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 CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

ZONE: 400

1. Reason for the Job
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 refer you to a more Detailed Visual Inspection (DVI) for limits and dispositions.
Do not use this inspection if you think that the engine had a Foreign Object Damage (FOD) event or birdstrike event. Refer task AMM 72-00-00-210-807 to do an inspection of the engine after birdstrike (FOD).
For more information about the fan case, refer to (72-21-00-00U).
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. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS

C. 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
Detailed Visual Inspection (DVI) of The Fan Case Ice Liner Panel Segments

3. Job Set-up
Subtask 72-21-01-941-056-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

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

Subtask 72-21-01-220-053-A ** ON A/C NOT FOR ALL

A. Detailed Visual Inspection (DVI) of the Fan Case Ice Liner Panel Segments
(1) Put an 636-1100-3GSE INLET COWL PROTECT COVER or equivalent MAT - PROTECTIVE inside the engine inlet cowl and on the inside surfaces of the fan case.
(2) Do a visual inspection of the fan case ice liner panel segments. See Table 1 and the figure:

Detailed Visual Inspection (DVI) of The Fan Case Ice Liner Panel Segments ** ON A/C NOT FOR ALL

Table 1: Fan Case Ice Liner Panel Segments - Visual Inspection

EXAMINE	DAMAGE	DISPOSITION
Ice liner panel segments for:
Dents	All quantities with smooth round bottoms that do not break the bond between the honeycomb material and the ice liner segment.	Permitted for continued service.
Cuts, cracks, gouges or tears	All quantities in the ice liner segment	Not permitted. Remove the engine in 50 flight hours or less.
Broken adhesive bond	All quantities not more than 6 in.2 (3870.96 mm2) between the honeycomb material and the ice liner segment, where the ice liner segment does not extend into the airstream.	Not permitted. Remove the engine in 50 flight hours or less.
	All quantities not less than 6 in.2 (3870.96 mm2) between the honeycomb material and the ice liner segment, where the ice liner segment does not extend into the airstream.	Not permitted. Remove the engine in 50 flight hours or less.
Loss of bond	All quantities between the fan case and the honeycomb material.	Not permitted. Remove the engine in 50 flight hours or less.
Filler between ice liner panel segments for:
Broken, loose or missing filler	All quantities that do not expose the honeycomb material and no loss of bond between the ice liner panel segments and the insert.	Not permitted. Repair the filler or remove the engine before next flight (Ref. AMM TASK 72-21-01-320-802).
	All quantities of loss of bond between the ice liner panel segments and the insert.	Not permitted. Remove the engine before next flight.

(3) In areas where you can see object damage on the fan case ice liner panel segments, do a tap test as follows to find areas of 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 636-1100-3GSE INLET COWL PROTECT COVER or equivalent MAT - PROTECTIVE from the inside of the air intake cowl.
(5) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 72-21-01-860-053-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.10 from 2021] 2026.04.01 13:02:08 UTC