# Proposed AD FAA-2009-1100: International Aero Engines AG Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-20-07
- Products: International Aero Engines
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 24, 2014, 79 FR 77411
- Comments due: February 23, 2015
- Became: [AD 2010-20-07](https://openairdocs.org/ad/2010-20-07)
- Docket: FAA-2009-1100 (https://www.regulations.gov/docket/FAA-2009-1100, where comments are filed)
- Project: 2009-NE-37-AD
- FR document: 2014-30194
- Official PDF: https://openairdocs.org/files/sha256/75/e8/75e8e2fc60bdeadb52e851769c91b66d5db3d1abf942a6a23867509454b3fb45 (from https://www.govinfo.gov/content/pkg/FR-2014-12-24/pdf/2014-30194.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/12/24/2014-30194/airworthiness-directives-international-aero-engines-ag-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AFFAA7CFA7B777DD86257DB8005412F0.0001
- Page: https://openairdocs.org/proposed/FAA-2009-1100

## Summary

We propose to supersede airworthiness directive (AD) 2012-09- 09 that applies to all International Aero Engines AG (IAE) V2500-A1, V2525-D5, and V2528-D5 turbofan engines, and certain serial numbers (S/ Ns) of IAE V2522-A5, V2524-A5, V2527-A5, V2527E-A5, V2527M-A5, V2530- A5, and V2533-A5 turbofan engines. AD 2012-09-09 currently requires cleaning, eddy current inspection (ECI) or fluorescent penetrant inspection (FPI), and initial and repetitive ultrasonic inspections (USIs) of certain high-pressure compressor (HPC) stage 3 to 8 drums, as well as replacement of the drum attachment nuts. Since we issued AD 2012-09-09, we discovered that additional attachment nuts for certain HPC stage 3 to 8 drums are affected. This proposed AD would expand the affected population for initial and repetitive USIs of the HPC stage 3 to 8 drum, revise the inspection intervals, require removal of the affected attachment nuts and any HPC stage 3 to 8 drum found cracked, and require a mandatory terminating action. We are proposing this AD to prevent failure of the HPC stage 3 to 8 drum, which could result in uncontained drum failure, damage to the engine, and damage to the airplane.

## Notices in this docket

- Mar 1, 2010: Notice of proposed rulemaking (NPRM); correction. (first notice), FR document 2010-4114, comments due Apr 12, 2010 (https://www.federalregister.gov/documents/2010/03/01/2010-4114/airworthiness-directives-international-aero-engines-ag-iae-v2500-a1-v2522-a5-v2524-a5-v2525-d5)
- Dec 30, 2011: Notice of proposed rulemaking (NPRM)., FR document 2011-33536, comments due Feb 28, 2012 (https://www.federalregister.gov/documents/2011/12/30/2011-33536/airworthiness-directives-international-aero-engines-ag-turbofan-engines)
- Dec 24, 2014: Notice of proposed rulemaking (NPRM)., FR document 2014-30194, comments due Feb 23, 2015 (https://www.federalregister.gov/documents/2014/12/24/2014-30194/airworthiness-directives-international-aero-engines-ag-turbofan-engines)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.