# Proposed AD FAA-2018-0404: International Aero Engines (IAE) Turbofan engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-21-10
- Products: International Aero Engines
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 11, 2018, 83 FR 26887
- Comments due: July 26, 2018
- Became: [AD 2018-21-10](https://openairdocs.org/ad/2018-21-10)
- Docket: FAA-2018-0404 (https://www.regulations.gov/docket/FAA-2018-0404, where comments are filed)
- FR document: 2018-12452
- Official PDF: https://openairdocs.org/files/sha256/f1/06/f106365a52abb5f5bdff91460443b9528a8d559659d84980511feaecfd4bdcdc (from https://www.govinfo.gov/content/pkg/FR-2018-06-11/pdf/2018-12452.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/06/11/2018-12452/airworthiness-directives-international-aero-engines-iae-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BC069CFC818EBA58862582A9004D32A0.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0404

## Summary

We propose to adopt a new airworthiness directive (AD) for all International Aero Engines (IAE) PW1133G-JM, PW1133GA-JM, PW1130G-JM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G-JM, PW1124G1-JM, and PW1122G-JM turbofan engines. This proposed AD was prompted by reports of in-flight engine shutdowns and aborted take-offs as the result of certain parts affecting the durability of the rear high-pressure compressor (HPC) rotor hub knife edge seal. This proposed AD would require replacing the diffuser case air seal assembly, the high- pressure turbine (HPT) 2nd-stage vane assembly, and the HPT 2nd-stage borescope stator vane assembly with parts eligible for installation. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 11, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-12452, comments due Jul 26, 2018 (https://www.federalregister.gov/documents/2018/06/11/2018-12452/airworthiness-directives-international-aero-engines-iae-turbofan-engines)

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