DOC AIRBUS | AMM A320FDetailed Visual Inspection of the Inlet Cone [PW11]
TASK 72-11-01-220-801-A
Detailed Visual Inspection of the Inlet Cone
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 72-11-01-941-052-A ** ON A/C NOT FOR ALL
Subtask 72-11-01-860-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:02:07 UTC
Detailed Visual Inspection of the Inlet Cone
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS 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.
ZONE: 400
1. Reason for the Job- You must do this procedure when it is time for a detailed inspection during a regular engine inspection/check or when you think there is foreign object damage.
- There is one inlet cone attached to the Low Pressure Compressor (LPC) fan blade hub. The inlet cone consists of the front and rear segments.
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | COVER - PROTECTION |
| No specific | 1 | FLASHLIGHT |
| No specific | 1 | MAT - PROTECTIVE |
| 636-1100-3GSE | 1 | INLET COWL PROTECT COVER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.P05-005) | cloth, cotton, lint-free |
| (Material No.P11-014) | PMC 9094 alcohol, isopropyl |
| (Material No.P11-049) | SPMC 148 cleaner, aqueous |
| (Material No.P11-078) | PMC 9016 alcohol, isopropyl |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-27-00-910-804-A | SPOP 208 - Degreasing of Parts by Solvent Wiping |
| TASK 70-27-00-910-805-A | SPOP 209 - Degreasing of Parts by Aqueous Cleaning |
| 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 72-11-01-300-801-A | Repair of the Inlet Cone |
| TASK 72-11-01-300-803-A | Repair the External Surface Damage of the Inlet Cone Assembly (Rear Segment) |
| TASK 72-11-01-300-804-A | Repair of the External Surface Damage of the Inlet Cone Assembly (Front Segment) |
| TASK 72-11-01-400-801-A | Installation of the Inlet Cone |
| TASK 72-11-01-960-801-A | Replacement of the Inlet-Cone Nut Plates and Rivets |
| TASK 72-15-00-960-801-A | Replacement of the Fan Shaft Cover |
| TASK 79-00-00-210-808-A | Visual Inspection of the Oil Consumption Monitoring |
Inlet ConeSubtask 72-11-01-941-052-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(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
CAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 72-11-01-220-050-A ** ON A/C NOT FOR ALL A. Detailed Visual Inspection of the Inlet Cone
(1) Removal of the protection covers:
(2) Put the MAT - PROTECTIVE or the 636-1100-3GSE INLET COWL PROTECT COVER in the engine intake cowl and fan case inner surfaces.
(3) If necessary, remove the inlet cone front segment to examine the nut plates and the internal surfaces (Ref. AMM TASK 72-11-01-000-801).
(4) If necessary, remove the inlet cone to examine the seal that is attached to the inlet cone rear segment (Ref. AMM TASK 72-11-01-000-801).
(5) Examine the inlet cone for cracks or delamination caused by a bird strike, ice ingestion or other object damage:
(a) Examine the outer surface for cracks that you can see or delamination caused by foreign object damage.
(b) If you think that there is internal damage, carefully examine the inner surfaces of the inlet cone (Area B) for cracks or delamination as follows:
2 If you find cracks or delamination, replace the applicable segment.
3 Examine the inlet cone internal surface for resin buildup.
(6) Examine the areas specified for the inlet cone front and rear segments.
(7) Remove the MAT - PROTECTIVE or the 636-1100-3GSE INLET COWL PROTECT COVER from the engine intake cowl and fan case inner surfaces.
(8) Examine the assembly for foreign objects, damage and correct assembly.
(9) Installation of the protection covers:
5. Close-up(1) Removal of the protection covers:
CAUTION:
REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.(2) Put the MAT - PROTECTIVE or the 636-1100-3GSE INLET COWL PROTECT COVER in the engine intake cowl and fan case inner surfaces.
(3) If necessary, remove the inlet cone front segment to examine the nut plates and the internal surfaces (Ref. AMM TASK 72-11-01-000-801).
(4) If necessary, remove the inlet cone to examine the seal that is attached to the inlet cone rear segment (Ref. AMM TASK 72-11-01-000-801).
(5) Examine the inlet cone for cracks or delamination caused by a bird strike, ice ingestion or other object damage:
(a) Examine the outer surface for cracks that you can see or delamination caused by foreign object damage.
(b) If you think that there is internal damage, carefully examine the inner surfaces of the inlet cone (Area B) for cracks or delamination as follows:
NOTE: Damage caused by objects which hit the outer surface of the inlet cone (and which may cause cracks that you can see or delamination of the inner surface) shows primary structural damage. This type of damage is usually caused by bird strikes, ice ingestion or impact tools.
1 Use the FLASHLIGHT to examine the interior surfaces of the front and rear segments. 2 If you find cracks or delamination, replace the applicable segment.
3 Examine the inlet cone internal surface for resin buildup.
(6) Examine the areas specified for the inlet cone front and rear segments.
| Table 601 - Examine the Inner and Outer Surfaces of the Inlet Cone |
| EXAMINE | DAMAGE | DISPOSITION |
|---|---|---|
| Area A: External surfaces of the inlet cone for superficial marks or scratches that do not go through the fluoroelastomer coating (no exposed composite material). | All quantities. | Permitted. |
| Area A: External surfaces of the inlet cone for cracks and scratches that do not go into the composite material (as shown by fiber fraying). | All scratches or marks with a depth more than the maximum depth of the protective coating. | Not permitted. Repair the protective coating (Ref. AMM TASK 72-11-01-300-801) or (Ref. AMM TASK 72-11-01-300-803) or (Ref. AMM TASK 72-11-01-300-804) or replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) in 50 flight hours or less. |
| Areas A and B: External and internal surfaces of the inlet cone for cracks, crazing or delamination that goes into the composite material (as indicated by fiber fraying or broken fibers). | All quantities. | Not permitted. Replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) immediately. |
| Area A: External and internal surfaces of the inlet cone for dents or chips that go through the fiberglass ply. | All quantities that show composite material. | Not permitted. Replace the inlet cone segment immediately (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801). |
| Area A: External surfaces of the inlet cone for erosion, peeling and flaking of the fluoroelastomer coating. | All quantities that show composite material. | Not permitted. Repair the protective coating (Ref. AMM TASK 72-11-01-300-801) or replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) in 50 flight hours or less. |
| Area B: Internal surfaces. | Blistering, cracking or charring as shown by discoloration. | Not permitted. Replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) in one cycle or less. |
| Resin buildup in the composite that does not move when light pressure is applied. | Permitted. | |
| Resin buildup in the composite that is loose or moves when light pressure is applied. | Not permitted. Replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) in 150 hours or less. | |
| Area D: Loose or missing fluoroelastomer coat at the bolt hole locations. | All quantities. | Permitted. |
| Areas A and B: External and internal surfaces for the inlet cone for scratches that go into the composite material (as shown by fiber fraying). | All quantities. | Not permitted. Replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) in 50 flight hours or less. |
| Areas A and B: External and internal surface of the inlet cone for oil wetness. | All quantities. | Wipe the oil with a |
| Areas A and B: External and internal surfaces of the inlet cone for oil puddles. | All quantities. | Wipe the oil with a |
| Table 602 - Examine the Inlet Cone Rear Segment Hardware |
| EXAMINE | DAMAGE | DISPOSITION |
|---|---|---|
| View B: Rear segment of the inlet cone for loose or missing Inside Diameter (ID) nut plates. | All quantities. | Not permitted. Replace the damaged inlet cone ID nut plates (Ref. AMM TASK 72-11-01-960-801) or replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) immediately. |
| View B: Rear segment of the inlet cone for the ID nut plates with worn or damaged threads. | All quantities. | Not permitted. Replace the damaged inlet cone ID nut plates (Ref. AMM TASK 72-11-01-960-801) or replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) immediately. |
| View C: Rubber seal on the rear segment of the inlet cone for loss of bond or looseness. | All quantities. | Not permitted. Replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) in 50 flight hours or less. |
| View C: Rubber seal on the rear segment of the inlet cone for damaged or missing material. | All quantities. | Not permitted. Replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) immediately. |
| View C: Rubber seal on the rear segment of the inlet cone for cracks or tears in the seal. | All quantities. | Not permitted. Replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) in 50 flight hours or less. |
| View C: The rear segment rear edge (lip) for cracks, crazing or delamination. | All quantities. | Not permitted. Repair the rear segment rear edge (lip) (Ref. AMM TASK 72-11-01-300-801) or replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) immediately. |
| View D, Area C: Support ring for looseness or damage. | All quantities. | Not permitted. Replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801) immediately. |
| View D: Support ring to spinner rivets that are loose, missing or damaged. | All quantities. | Not permitted. Contact Pratt & Whitney for repair. Replace the inlet cone segment (Ref. AMM TASK 72-11-01-000-801) and (Ref. AMM TASK 72-11-01-400-801). |
(8) Examine the assembly for foreign objects, damage and correct assembly.
(9) Installation of the protection covers:
CAUTION:
INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.
(a) Make sure that you install all the necessary COVER - PROTECTION to prevent damage to the engine.Subtask 72-11-01-860-052-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).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).