Airworthiness Directive · Amendment 39-23153 · Turbine section
International Aero Engines AG Engines
This AD applies to International Aero Engines AG (IAE AG) Model V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, V2531-E5, and V2533-A5 engines.
The FAA is adopting a new airworthiness directive (AD) for certain International Aero Engines AG (IAE AG) Model V2522-A5, V2524- A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, V2531-E5, and V2533-A5 engines. This AD was prompted by a manufacturer investigation that revealed a quality escape following angled ultrasonic inspections (AUSIs) performed on certain high-pressure turbine (HPT) 1st-stage hubs and HPT 2nd-stage hubs. This AD requires removal and replacement of certain HPT 1st-stage hubs and HPT 2nd-stage hubs. The FAA is issuing this AD to address the unsafe condition on these products.
For engines with an installed part, part number (P/N) and serial number (S/N) identified in table 1 to paragraph (g) of this AD, at the next engine shop visit after the effective date of this AD before exceeding the applicable removal cycle limit listed in table 1 to paragraph (g) of this AD or within 100 flight cycles from the effective date of this AD, whichever occurs later, remove the affected part from service and replace with a part eligible for installation.
| Part | P/N | S/N | Removal cycle limit (cycles since new) |
|---|---|---|---|
| HPT 1st-stage hub | 2A5001 | PKLBSK9287 | 100 |
| HPT 1st-stage hub | 2A5001 | PKLBSS9200 | 4,800 |
| HPT 1st-stage hub | 2A5001 | PKLBST5011 | 5,500 |
| HPT 1st-stage hub | 2A5001 | PKLBST7489 | 6,200 |
| HPT 2nd-stage hub | 2A4802 | PKLBST5005 | 4,000 |
| HPT 2nd-stage hub | 2A4802 | PKLBSS9840 | 3,900 |
| HPT 2nd-stage hub | 2A4802 | PKLBSS0301 | 5,000 |
| HPT 2nd-stage hub | 2A4802 | PKLBSR2100 | 6,000 |
After the effective date of this AD, do not install an HPT 1st-stage hub or HPT 2nd-stage hub that has a P/N and S/N listed in table 1 to paragraph (g) of this AD in any engine.
For the purpose of this AD:
(1) A “part eligible for installation” is an HPT 1st-stage hub or HPT 2nd-stage hub having a P/N and S/N that is not listed in table 1 to paragraph (g) of this AD.
(2) An “engine shop visit” is the induction of an engine into the shop for maintenance involving the separation of any major mating engine flanges, H-P, except for the following situations, which do not constitute an engine shop visit:
(i) Separation of engine flanges solely for the purposes of transportation without subsequent engine maintenance.
(ii) Engine removal for the purpose of performing field maintenance activities at a maintenance facility in lieu of performing them on-wing.
