Visual Examination of the Fan Blade Root [PW11]

TASK 72-11-03-210-801-A
Visual Examination of the Fan Blade Root

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 visual inspection of the root area of the fan blades.
For more information about the fan blade inspection, refer to (72-11-03-210-802-A).
Do this procedure when you think there is Foreign Object Damage (FOD).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	GLOVES - PROTECTIVE
No specific	1	MAT - PROTECTIVE
636-1100-3GSE	1	INLET COWL PROTECT COVER
PWA211814	1	CHART, PHOTOGRAPH

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 70-28-00-910-802-A	SPOP 533 - Blending and Buffing of Steel, Nickel, Cobalt, Aluminum and Magnesium Alloy Components
TASK 70-28-00-910-803-A	SPOP 42 - Chromate Conversion Coating of Aluminum
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 72-11-01-000-801-A	Removal of the Inlet Cone
TASK 72-11-01-400-801-A	Installation of the Inlet Cone
TASK 72-11-03-000-801-A	Removal of the Fan Blades
TASK 72-11-03-210-803-A	Visual Examination of the Fan Blade Galvanic Isolation
TASK 72-11-03-400-801-A	Installation of the Fan Blades
Visual Examination of the Fan Blade Root
Visual Inspection of the Fan Blade Root (Fan Blade Colors)

3. Job Set-up
Subtask 72-11-03-941-055-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 72-11-03-210-050-A ** ON A/C NOT FOR ALL

A. Visual Examination of the Fan Blade Root
(1) Use this procedure to visually examine the fan blade root area for damage as follows.

NOTE: For this inspection procedure, the root area is defined as the areas of the fan blade that cannot be inspected while it is installed in an engine.

(2) Put the MAT - PROTECTIVE or 636-1100-3GSE INLET COWL PROTECT COVER in the air intake cowl.

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.

(3) Wear the GLOVES - PROTECTIVE when you touch the blades.
(4) Remove the inlet cone (Ref. AMM TASK 72-11-01-000-801).
(5) Remove the fan blades as necessary (Ref. AMM TASK 72-11-03-000-801).
(6)

Visual Inspection of the Fan Blade Root (Fan Blade Colors) ** ON A/C NOT FOR ALL

NOTE: Polyurethane coat is black, primer is green and base metal is silver/gray in color. See PWA211814 CHART, PHOTOGRAPH.

NOTE: Blades removed from service because of surface damage can possibly be repaired and put back in a serviceable condition.

Table 601: Fan Blade Root Examination Limits

EXAMINE	DAMAGE	DISPOSITION
All Areas:
Cracks	All quantities or depths	Not permitted. Remove the blade from service immediately.
Missing polyurethane coat without primer or base metal shown	All quantities	Permitted.
Missing polyurethane coat with primer shown but no base metal shown	No more than 0.25 in.2 (161.29 mm2) total on the root area as defined in step 4.A.(1). Visual Examination of the Fan Blade Root ** ON A/C NOT FOR ALL	Permitted.
Nodules in coat area (nodules are small, rounded, and raised lumps of coat material)	Nodules that are smooth and continuous that do not move with light pressure.	Permitted.
Blade root side surfaces (neck)
Area A (each side, includes root fillet radius):	All base metal that can be seen.	Not permitted. If 2.0 in. (50.80 mm) of root front face, and if not galvanic isolated (or not checked), repair or replace the blade in five cycles. If 2.0 in. (50.80 mm) of root front face, and if galvanic isolated, repair or replace the blade in 35 cycles. If more than 2.0 in. (50.80 mm) from front face, repair or replace the blade in 50 cycles. Do a check for galvanic isolation (Ref. AMM TASK 72-11-03-210-803). Contact P&W for repair.
	Wear or surface damage into base metal.	Not permitted. Remove the blade from service immediately.
Blade root pressure face wear pads
Area B (each side):	Wear that does not go through the wear pad.	Permitted.
	Wear that goes through the wear pad.	Not permitted. Remove blade from service immediately or replace the pad (Ref. AMM TASK 72-11-03-000-801) and (Ref. AMM TASK 72-11-03-400-801).
	Loose or missing wear pad.	Not permitted. Remove the blade from service immediately or replace the pad (Ref. AMM TASK 72-11-03-000-801) and (Ref. AMM TASK 72-11-03-400-801).
	Wear or surface damage into base metal.	Not permitted. Remove the blade from service immediately.
Blade root rear face
Area C (includes edge radii):	All base metal that can be seen.	Not permitted. Repair or replace blade in 50 cycles. Contact P&W for repair.
	Wear or surface damage into base metal.	Not permitted. Remove the blade from service immediately.
	Loss of bond in wear pad tabs not more than 0.100 in. (2.54 mm) in total length.	Permitted, if no base metal or primer can be seen.
	Chipped, porous or missing epoxy.	Permitted, if no base metal can be seen.
Blade lower root surface
Area D:	All surface damage not more than 0.005 in. (0.127 mm) in depth.	Permitted. Repair with blend as necessary by SPOP 533 (Ref. AMM TASK 70-28-00-910-802) and alodine touch-up repair by SPOP 42 (Ref. AMM TASK 70-28-00-910-803).
	All surface damage more than 0.005 in. (0.127 mm) in depth.	Not permitted. Remove the blade from service immediately.
	All base material that you can see.	Not permitted. Remove from service in 50 cycles or do an alodine touch-up repair by SPOP 42 (Ref. AMM TASK 70-28-00-910-803).
Blade root front face (other than ground tab Area H)
Area E:	All base metal that can be seen.	Not permitted. Repair or replace blade in five cycles if not galvanic isolated (or not checked) or 35 cycles if galvanic isolated. Do a check for galvanic isolation (Ref. AMM TASK 72-11-03-210-803). Contact P&W for repair (Ref. AMM TASK 72-11-03-000-801) and (Ref. AMM TASK 72-11-03-400-801).
	Wear or surface damage into base metal.	Not permitted. Remove the blade from service immediately.
	Loss of bond in wear pad tabs not more than 0.100 in. (2.540 mm) in length.	Permitted, if no base metal can be seen.
	Chipped, porous or missing epoxy.	Permitted, if no base metal can be seen.
Platform seal
Area F:	Tearing, cracks or missing material in platform seal.	Permitted, with no missing material more than 0.060 in. (1.524 mm) in total axial length.
	Tearing, cracks or missing material in platform seal more than 0.060 in. (1.524 mm) in axial length.	Not permitted. Repair or replace blade in 50 cycles. Repair platform seal (Ref. AMM TASK 72-11-03-000-801) and (Ref. AMM TASK 72-11-03-400-801).
	Loss of bond of seal less than 0.5 in. (12.70 mm) in length.	Permitted.
Blade root non-pressure face wear pads
Area G (each side):	Wear that does not go through the wear pad.	Permitted.
	Wear that goes through the wear pad.	Not permitted. If 2.0 in. (50.80 mm) of root front face, and if not galvanic isolated (or not checked), repair or replace the blade in five cycles. If 2.0 in. (50.80 mm) of root front face, and if galvanic isolated, repair or replace the blade in 35 cycles. If more than 2.0 in. (50.80 mm) from front face, repair or replace the blade in 50 cycles. Do a check for galvanic isolation by (Ref. AMM TASK 72-11-03-210-803). (Ref. AMM TASK 72-11-03-000-801) and (Ref. AMM TASK 72-11-03-400-801).
	Loose or missing wear pad not more than 0.100 in. (2.540 mm) in length.	Permitted, if no base metal can be seen.
	Wear or surface damage that goes into the base metal that was covered by the wear pad.	Not permitted. Remove the blade from service immediately.
	Wear or surface damage that goes into base metal near root end faces.	Examine with Area D requirements.
Ground tab
Area H:	Loose or missing ground tab.	Not permitted. Remove the blade from service or repair tab in ten cycles or less. (Ref. AMM TASK 72-11-03-000-801) and (Ref. AMM TASK 72-11-03-400-801).
	Damage fully through the ground tab less than 0.250 in. (6.350 mm) in length with no fan blade base metal or primer in view.	Permitted, if ground tab is not broken into two pieces or more.
	Damage fully through the ground tab less than 0.250 in. (6.35 mm) in length with fan blade base metal or primer in view.	Not permitted. Repair or replace blade in five cycles if not galvanic isolated (or not checked) or 35 cycles if galvanic isolated. Do a check for galvanic isolation (Ref. AMM TASK 72-11-03-210-803).
Platform
Area J (platform side edges):	Base metal that you can see not more than 0.01 in.2 (6.45 mm2) total area. Can be multiple areas if the sum of the areas is not more than 0.01 in.2 (6.45 mm2). No bare metal in 2.0 in. (50.80 mm) of the ground tab.	Permitted. Bare metal areas must be coated by SPOP 42 (Ref. AMM TASK 70-28-00-910-803).
	Base metal that you can see more than 0.01 in.2 (6.45 mm2) in total area.	Not permitted. Repair polyurethane coat or replace blade in 2600 cycles. Contact P&W for repair.
	Base metal damage more than 0.005 in. (0.13 mm) in depth.	Remove from service in 50 cycles.
Area K (platform underside near edge):	Base metal that you can see not more than 0.01 in.2 (6.45 mm2) total area. Can be multiple areas if the sum of the areas is not more than 0.01 in.2 (6.45 mm2). No bare metal in 2.0 in. (50.80 mm) of the ground tab.	Permitted. Bare metal areas must be coated by SPOP 42 (Ref. AMM TASK 70-28-00-910-803).
	Base metal that you can see more than 0.01 in.2 (6.45 mm2) in total area.	Not permitted. Repair polyurethane coat or replace blade in 2600 cycles. Contact P&W for repair.
	Base metal damage more than 0.005 in. (0.127 mm) in depth.	Remove from service in 50 cycles.
Area L (platform underside):	All metal that can be seen with base metal damage no more than 0.005 in. (0.127 mm) deep.	Not permitted. If 2.0 in. (50.80 mm) from the ground tab, repair or replace blade in 50 cycles if not galvanic isolated (or not checked) or 1100 cycles if galvanic isolated. If more than 2.0 in. (50.80 mm) away from the ground tab, repair or replace blade in 2600 cycles. Do a check for galvanic isolation (Ref. AMM TASK 72-11-03-210-803). (Ref. AMM TASK 72-11-03-000-801) and (Ref. AMM TASK 72-11-03-400-801).
Area M (Fan blades with Teflon root coat. Teflon coat is light gray or white in color and partially covers the wear pads):
Wear, scratches or chips in Teflon coated surface not through the coating (identified when Teflon coating can be seen)	All quantities	Permitted.
Missing areas of Teflon coat where wear pad can be seen	All quantities	Permitted.
Missing areas of Teflon coat where base metal can be seen	Permitted no more than 0.25 in.2 (161.29 mm2). Wear in base metal no more than 0.005 IN. (0.127 MM) depth permitted on bottom surface.	Exposed base metal on bottom surface must be treated per SPOP 42 (Ref. AMM TASK 70-28-00-910-803). For Teflon coat repair and replacement, contact P&W.
	Base metal damage more than 0.005 in. (0.13 mm) in depth.	Remove from service by five cycles.

(7) Install the fan blades as necessary (Ref. AMM TASK 72-11-03-400-801).
(8) Install the inlet cone (Ref. AMM TASK 72-11-01-400-801).
(9) Remove the MAT - PROTECTIVE or 636-1100-3GSE INLET COWL PROTECT COVER from the air intake cowl.
(10) Examine the assembly for foreign objects, damage, and correct assembly.

5. Close-up
Subtask 72-11-03-942-050-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.10 from 2021] 2026.04.01 02:47:56 UTC