# Proposed AD FAA-2005-23500: International Aero Engines (IAE) V2500 Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-21-05
- Products: International Aero Engines
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 2, 2006, 71 FR 31978
- Comments due: August 1, 2006
- Became: [AD 2007-21-05](https://openairdocs.org/ad/2007-21-05)
- Docket: FAA-2005-23500 (https://www.regulations.gov/docket/FAA-2005-23500, where comments are filed)
- Project: 2005-NE-46-AD
- FR document: E6-8562
- Official PDF: https://openairdocs.org/files/sha256/30/38/30381741cd5b679fac160361300b9b35673d15723c890377d7bdb5db795935ca (from https://www.govinfo.gov/content/pkg/FR-2006-06-02/pdf/E6-8562.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/06/02/E6-8562/airworthiness-directives-international-aero-engines-iae-v2500-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7181DA05BD3842EB86257181004EC87F.0001
- Page: https://openairdocs.org/proposed/FAA-2005-23500

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for IAE V2500-A1, V2522-A5, V2524-A5, V2527-A5, V2527E-A5, V2527M-A5, V2530-A5, V2533-A5, V2525-D5, and V2528-D5 turbofan engines. This proposed AD would require repetitive monitoring of N2 vibration on all IAE V2500 series engines to identify engines that might have a cracked high pressure turbine (HPT) stage 2 air seal. This proposed AD results from a report that HPT stage 2 air seals have developed cracks. We are proposing this AD to prevent uncontained failure of the HPT stage 2 air seal.

## Notices in this docket

- Jun 2, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-8562, comments due Aug 1, 2006 (https://www.federalregister.gov/documents/2006/06/02/E6-8562/airworthiness-directives-international-aero-engines-iae-v2500-series-turbofan-engines)

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