Visual Examination (After Bird Strike (Foreign Object Damage)) [PW11]

TASK 72-00-00-210-807-A
Visual Examination (After Bird Strike (Foreign Object Damage))

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: THERE IS A POSSIBLE HEALTH RISK TO PERSONNEL WHO DO MAINTENANCE TASKS AFTER A BIRD STRIKE. THE SAFETY MEASURES THAT FOLLOW ARE RECOMMENDED:

USE DISPOSABLE GLOVES.
USE CUT RESISTANT GLOVES OVER THE DISPOSABLE GLOVES.
USE A DISPOSABLE COVERALL IF THERE IS A RISK OF BODY CONTACT WITH THE BIRD REMAINS (ORGANIC MATTER) DURING FEATHER COLLECTION OR ENGINE CLEANING.
DO NOT USE PRESSURIZED AIR OR WATER TO CLEAN THE PARTS WHICH WERE IN CONTACT WITH THE BIRD.
REMOVE THE BIRD REMAINS AND PUT THEM IN A PLASTIC BAG.
DO NOT TOUCH YOUR FACE, EYES, NOSE, ETC. WITH YOUR GLOVES.
REMOVE THE GLOVES AND THE DISPOSABLE COVERALL AND PUT THEM IN THE SAME PLASTIC BAG AS THE REMAINS. SEAL THE BAG.
DISCARD THE BAG AS YOU DO FOR USUAL GARBAGE.
CAREFULLY WASH YOUR HANDS WITH SOAP AND WATER.

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

ZONE: 400

1. Reason for the Job
Use this inspection procedure to examine the engine after birds or unwanted foreign objects have gone into the engine.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	BAG - PLASTIC
No specific	1	BRUSH - WIRE
No specific	1	GLOVES - PROTECTIVE
No specific	1	LIGHT SOURCE - ULTRA-VIOLET
No specific	AR	MAT - PROTECTIVE
No specific	1	MAT - WORK
No specific	1	STERILE GAUZE PAD
No specific	1	VACUUM CLEANER
CTE8003	1	SYSTEM BOROSCOPE (VIDEO)
PWA110187	1	KIT CONTROL

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P05-005)	lint-free cotton cloth
(Material No.P11-014)	isopropyl alcohol

C. Work Zones and Access Panels

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

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 72-00-00-100-802-A	Cleaning of the Engine Gaspath
TASK 72-00-00-200-809-A	Inspection of the Engine (After Surge or Stall)
TASK 72-00-00-210-812-A	General Visual Inspection (GVI) of the Engine Exhaust Area
TASK 72-00-00-210-813-A	General Visual Inspection (GVI) of the Engine Inlet Area
TASK 72-31-00-290-802-A	Borescope Inspection of the Low Pressure Compressor (LPC) Assembly
TASK 72-35-00-290-801-A	Borescope Inspection of the High Pressure Compressor (HPC) Assembly
TASK 72-41-00-290-802-A	Borescope Inspection of Combustion Chamber and HPT Nozzle Guide Vanes
TASK 72-51-00-290-802-A	Borescope Inspection of the 1st and 2nd Stage Turbine Blades
TASK 72-53-00-200-801-A	Borescope Inspection of the Low Pressure Turbine (LPT) Assembly
TASK 75-31-00-200-803-A	Mechanical Check of the Low Pressure Compressor (LPC) Stator Vane Control System
TASK 77-11-22-000-801-A	Removal of the NF Speed Probe
TASK 77-11-22-210-801-A	Visual Inspection of NF Speed Probe
TASK 79-21-11-000-802-A	Removal of the Air/Oil Heat Exchanger (AOHX)
TASK 79-21-11-400-802-A	Installation of the Air/Oil Heat Exchanger (AOHX)
Visual Examination (After Bird Strike) - (Inlet Area)
Visual Examination (After Bird Strike) - (Exhaust Area)
Visual Examination (After Bird Strike) - (Air/Oil Heat Exchanger)
Visual Examination (After Bird Strike or (Foreign Object Damage))
Visual Examination (Bird Strike or (Foreign Object Damage)) - (Inspection Flow Chart)
Visual Examination (After Bird Strike or (Foreign Object Damage)) - (NF Speed Probe Inspection Flow Chart)
Visual Examination (After Bird Strike (Foreign Object Damage)) - (LPC Borescope Ports)
Visual Examination (After Bird Strike (Foreign Object Damage)) - (Vane Not Aligned)

3. Job Set-up
Subtask 72-00-00-941-178-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).

Subtask 72-00-00-010-258-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an ACCESS PLATFORM 1M(3 FT) in position.
(2) Install an MAT - WORK in the inlet cowl.

4. Procedure

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

Subtask 72-00-00-210-161-A ** ON A/C NOT FOR ALL

A. Visual Inspection (After Bird Strike (Foreign Object Damage))
(1) After a report of a bird strike or if a foreign object goes into the engine, do a visual inspection before the next flight for signs of bird debris or damage as follows:

NOTE: It can be very difficult to determine if a bird strike has occurred. It is necessary to do an inspection after the first report of a bird strike as it will become more difficult with elapsed run time and bad weather to see signs of a bird strike.

NOTE: You can use the LIGHT SOURCE - ULTRA-VIOLET to help identify bird debris. In darkened conditions, the proteins left behind in the bird snarge (smeared bird remains on surfaces) fluoresce with a greenish glow in the ultra violet illumination. A continuous smear is typical for a bird strike.

NOTE: New damage is damage that was not accepted or repaired before. If it is not known if the damage was accepted or repaired before, you must do the inspection as if it was new damage.

(2) Install the MAT - PROTECTIVE in the inlet cowl.
(3) Do a visual inspection of the engine inlet area for bird debris (feathers or snarge). Refer to procedures 4 and 5 in (Ref. AMM TASK 72-00-00-210-813) for areas to examine. If damage or signs of bird debris is identified, determine if it is in Area A or Area B of the inlet. Give special attention to the acoustic liners and the pressure surface of blades below 50 percent span.

Visual Examination (After Bird Strike) - (Inlet Area) ** ON A/C NOT FOR ALL

Visual Examination (After Bird Strike or (Foreign Object Damage)) ** ON A/C NOT FOR ALL

(4) If any damage, feathers or snarge are found in the inlet area, you must take an overall photo of the damage and a close-up photo with scale for reference. Collect the bird feathers and/or snarge as follows:
(a) If bird feathers are found, collect the feathers and put them in the sealable BAG - PLASTIC. Put a label on the bag with the engine serial number and the area of the engine from where they were collected.
(b) For feathers collected outside of the United States, you must put the whole feather in the isopropyl alcohol (Material No.P11-014) and dry before you put it in the BAG - PLASTIC, for shipment to the United States.
(c) If a large section of the bird is found not damaged, pluck (do not cut) a variety of feathers with a color pattern and do the procedures specified in Step 4.A.(4)(a) and Step 4.A.(4)(b).
(d) For blood smear or organic remains (snarge) on the engine surface, remove with the lint-free cotton cloth (Material No.P05-005) , or STERILE GAUZE PAD or isopropyl alcohol (Material No.P11-014) . Put the removed bird remains, along with the lint-free cotton cloth (Material No.P05-005) , or STERILE GAUZE PAD or isopropyl alcohol (Material No.P11-014) in the BAG - PLASTIC that can be sealed. Put a label on the bag with the engine serial number and the area of the engine where they were collected.
(e) Send the bird feathers or snarge collected to the nearest Pratt & Whitney field representative for species identification.
(5) Do a visual inspection of the turbine exhaust case and the Low Pressure Turbine (LPT) 3rd stage blades for damage or pieces of metal (Ref. AMM TASK 72-00-00-210-812).

Visual Examination (After Bird Strike) - (Exhaust Area) ** ON A/C NOT FOR ALL

(6) Return the engine to service if you do not see any signs of bird debris or damage and none of what follows were reported:
(a) The flight crew reported a cooked bird smell in the cockpit or cabin.
(b) The engine surged or stalled after the bird strike. If a surge or stall did occur, do an inspection of the engine after surge or stall (Ref. AMM TASK 72-00-00-200-809).
(c) The engine parameters changed after the bird strike:
1 If the engine parameters changed after the bird strike, record all Electronic Centralized Aircraft Monitoring (ECAM) warning or messages and do the applicable troubleshooting procedures.
(7) If the fan blades are damaged, an engine surge/stall occurred or engine parameters changed, determine if inspection of the NF speed probe is necessary:

Visual Examination (Bird Strike or (Foreign Object Damage)) - (Inspection Flow Chart) ** ON A/C NOT FOR ALL

(a) If fan blade damage is found and is in serviceable limits, determine if the NF speed probe is functional after the bird strike:
1 If the NF speed probe operates correctly, remove and examine it in 750 hours or when the fan blades are removed, whichever comes first. Refer to (Ref. AMM TASK 77-11-22-000-801) for removal and (Ref. AMM TASK 77-11-22-210-801) for inspection.
2 If the NF speed probe does not operate correctly, remove and examine it in ten days by current failed Prognostics and Health Management Unit (PHMU) dispatch requirement. Refer to (Ref. AMM TASK 77-11-22-000-801) for removal and (Ref. AMM TASK 77-11-22-210-801) for inspection.
(b) If the fan blade is not in limits, remove the NF speed probe in one flight cycle and examine. Refer to (Ref. AMM TASK 77-11-22-000-801) for removal and (Ref. AMM TASK 77-11-22-210-801) for inspection.
(8) Turn the Low Pressure Compressor (LPC) rotor as follows:
(a) Put on the GLOVES - PROTECTIVE and slowly turn the fan in the counterclockwise direction as seen from the front.
(b) Make sure the fan turns freely and listen for unusual noises.
(c) If the rotor does not turn freely and/or there are unusual noises, let the engine temperature decrease for 30 to 60 minutes more.
(d) If the fan does not turn freely after the cooling period and/or there are unusual noises, reject the engine.
(9) If you find signs of bird debris or new damage in the inlet Area A on one engine only, do the borescope inspection specified by Step 4.A.(11) in ten flight hours or two flight cycles, whichever occurs first. If you see signs of bird debris or damage on both engines, do the borescope inspection before the next flight. See sheet 1 of the figure:

Visual Examination (After Bird Strike or (Foreign Object Damage)) - (NF Speed Probe Inspection Flow Chart) ** ON A/C NOT FOR ALL

(10) If you find fan blade damage in inlet Area B more than the serviceable limits on one engine only, do the borescope inspection specified by Step 4.A.(11) in ten flight hours or two flight cycles, whichever occurs first. If you find Area B fan blade damage more than the serviceable limits on both engines, do the borescope inspections before the next flight. Inspect the remainder of inlet Area B for bird debris and damage. See sheet 2 of the figure:

Visual Examination (After Bird Strike or (Foreign Object Damage)) - (NF Speed Probe Inspection Flow Chart) ** ON A/C NOT FOR ALL

(11) Do the borescope inspection as follows:
(a) Use the PWA110187 KIT CONTROL or the CTE8003 SYSTEM BOROSCOPE (VIDEO) and do a borescope inspection of the LPC. Examine the blades and vanes very carefully for damage (Ref. AMM TASK 72-31-00-290-802).
(b) Examine the LPC Inlet Guide Vanes (IGV's) for vanes that are not aligned as follows:

NOTE: A vane that is not aligned is turned along its axis, at a different angle than the adjacent vanes.

1 Move the LPC Stator Vane Actuator (SVA) to the fully open position (Ref. AMM TASK 75-31-00-200-803).
2 Put the flexible borescope through AP LPC-1 and move it counterclockwise (aft looking forward) until the borescope port is in view

Visual Examination (After Bird Strike (Foreign Object Damage)) - (LPC Borescope Ports) ** ON A/C NOT FOR ALL

3 Examine the vanes as you retract the borescope. The borescope must be retracted slowly to get a clear view of the airfoil at the outboard side of the IGVs. The borescope must stay in focus on the trailing edges of the airfoils. It can help to record during the inspection process.
4 Move the LPC SVA to the fully closed position (Ref. AMM TASK 75-31-00-200-803).
5 Put the flexible borescope through AP LPC-1 and move it counterclockwise (aft looking forward) until the borescope port is in view

Visual Examination (After Bird Strike (Foreign Object Damage)) - (LPC Borescope Ports) ** ON A/C NOT FOR ALL

6 Examine the vanes as you retract the borescope. The borescope must be retracted slowly to get a clear view of the airfoil at the outboard side of the IGVs. The borescope must stay in focus on the trailing edges of the airfoils. It can help to record during the inspection process.
7 Contact Pratt and Whitney if any vanes that are not aligned are found

Visual Examination (After Bird Strike (Foreign Object Damage)) - (Vane Not Aligned) ** ON A/C NOT FOR ALL

(c) If you see signs of bird debris or new damage in the LPC, use the PWA110187 KIT CONTROL or the CTE8003 SYSTEM BOROSCOPE (VIDEO) and do a borescope inspection of the High Pressure Compressor (HPC) airfoils (Ref. AMM TASK 72-35-00-290-801).
(d) If you see signs of bird debris or new damage in the HPC, do a borescope inspection of the combustion chamber and High Pressure Turbine (HPT) with the PWA110187 KIT CONTROL or CTE8003 SYSTEM BOROSCOPE (VIDEO). Refer to (Ref. AMM TASK 72-41-00-290-802) for the combustion chamber and (Ref. AMM TASK 72-51-00-290-802) for the HPT.
(e) If you see signs of bird debris or new damage in the rear stages of the HPT, do a borescope inspection of the LPT with the PWA110187 KIT CONTROL or CTE8003 SYSTEM BOROSCOPE (VIDEO). Refer to (Ref. AMM TASK 72-53-00-200-801).
(12) If you find signs of damage and the damage is more than the repairable limits, remove the engine from service.
(13) If you find signs of damage and the damage is in the serviceable or repairable limits, make any necessary repairs.
(14) Examine the inlet to the air/oil heat exchanger for blockage. Remove any debris with the BRUSH - WIRE and the VACUUM CLEANER. If you cannot remove the blockage, replace the air/oil heat exchanger. Refer to (Ref. AMM TASK 79-21-11-000-802) and (Ref. AMM TASK 79-21-11-400-802).

Visual Examination (After Bird Strike) - (Air/Oil Heat Exchanger) ** ON A/C NOT FOR ALL

(15) If there is no damage, return the engine to service.

NOTE: It is permitted to do a wash in 25 flight hours or 10 cycles to remove bird debris from the engine gaspath (Ref. AMM TASK 72-00-00-100-802).

(16) Remove the MAT - PROTECTIVE from the inlet cowl.
(17) Examine the assembly for foreign objects, damage, and correct assembly.

5. Close-up
Subtask 72-00-00-942-071-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 MAT - WORK from the inlet cowl.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:47:15 UTC