Detailed Inspection of Fan Blades [PW11]

TASK 72-11-03-210-802-A
Detailed Inspection of Fan Blades

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

WARNING: USE PROTECTIVE GLOVES TO PREVENT POSSIBLE INJURY TO THE HANDS WHEN YOU TOUCH OR HOLD THE FAN BLADES. THE BLADE EDGES ARE SHARP AND CAN CUT THE HANDS.

ZONE: 400

1. Reason for the Job
Refer to the MPD TASK: 721100-W1
DETAILED INSPECTION OF FAN BLADES.
Use this procedure to visually examine the fan blades for erosion.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	FLASHLIGHT
No specific	1	GLOVES - PROTECTIVE
No specific	1	MAT - PROTECTIVE
No specific	1	MIRROR - INSPECTION
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 72-11-03-210-801-A	Visual Examination of the Fan Blade Root
TASK 72-11-03-220-805-A	Visual Inspection of the Fan Blade Polyurethane-Coat
TASK 72-11-03-710-801-A	Sequencing of the Fan Blades with PWBAL
Visual Examination of the Fan Blades for Erosion

3. Job Set-up
Subtask 72-11-03-941-057-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 72-11-03-210-051-A ** ON A/C NOT FOR ALL

A. Visual Inspection of the Fan Blades for Erosion
(1) Put the 636-1100-3GSE INLET COWL PROTECT COVER or the MAT - PROTECTIVE in the engine inlet.
(2) Use the GLOVES - PROTECTIVE when you touch the fan blades.
(3) Use the FLASHLIGHT and the MIRROR - INSPECTION to do a visual inspection of the fan blades for erosion. Refer to Table 1 for inspection limits.

Visual Examination of the Fan Blades for Erosion ** ON A/C NOT FOR ALL

NOTE: Erosion can be found by the light touch across the leading edge. Erosion on the leading edge is identified by rough, sandpaper-like texture.

NOTE: See sheet 3 for examples of the leading edge contours.

Visual Examination of the Fan Blades for Erosion ** ON A/C NOT FOR ALL

Table 1 - Visual inspection of the fan blade for erosion

EXAMINE	DAMAGE	DISPOSITION
Areas A (Convex side) and B (Concave side) for:
Missing polyurethane coating with primer or base metal shown.	All quantities	Do a visual inspection of the fan blade polyurethane-coat (Ref. AMM TASK 72-11-03-220-805).
Area A (Convex side) for:
Missing polyurethane coating without primer or base metal shown.	0.005 in. (0.127 mm) maximum depth	Permitted
	More than 0.005 in. (0.127 mm)	Not permitted. Replace the blade by 150 cycles. For removal, refer to the procedure (Ref. AMM TASK 72-11-03-710-801).
Area D (Root) for:
Missing polyurethane coating without primer or base metal shown.	0.004 in. (0.10 mm) maximum depth	Permitted
Missing polyurethane coating with primer or base metal shown.	All quantities	Do a visual examination of the fan blade root (Ref. AMM TASK 72-11-03-210-801).
Area C for:
Erosion	Smooth, continuous surface with minimum roughness (Sheet 2, examples 1 and 2). Visual Examination of the Fan Blades for Erosion ** ON A/C NOT FOR ALL	Permitted
	Rough, coarse and irregular surface almost the same as sandpaper (Sheet 2, examples 3, 4 and 5). Visual Examination of the Fan Blades for Erosion ** ON A/C NOT FOR ALL	Contact Pratt & Whitney.
Area B (Concave side) for:
Missing polyurethane coating without primer or base metal shown.	0.015 in. (0.381 mm) maximum depth	Permitted
	More than 0.015 in. (0.381 mm)	Not permitted. Replace the blade by 150 cycles. For removal, refer to the procedure (Ref. AMM TASK 72-11-03-710-801).

5. Close-up
Subtask 72-11-03-942-052-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Remove the MAT - PROTECTIVE or 636-1100-3GSE INLET COWL PROTECT COVER inside the engine inlet.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:47:58 UTC