# Proposed AD FAA-2016-5307: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-19-09
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 11, 2016, 81 FR 21286
- Comments due: June 10, 2016
- Became: [AD 2016-19-09](https://openairdocs.org/ad/2016-19-09)
- Docket: FAA-2016-5307 (https://www.regulations.gov/docket/FAA-2016-5307, where comments are filed)
- Project: 2016-NE-08-AD
- FR document: 2016-08111
- Official PDF: https://openairdocs.org/files/sha256/b9/4a/b94a6ff873f4c7ebea3345c0374ab62808652b71f9a91c8585fa32933689144c (from https://www.govinfo.gov/content/pkg/FR-2016-04-11/pdf/2016-08111.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/04/11/2016-08111/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F8AC54DA6EF07A6486257F92005073AE.0001
- Page: https://openairdocs.org/proposed/FAA-2016-5307

## Summary

We propose to adopt a new airworthiness directive (AD) for all General Electric Company (GE) GE90-76B, GE90-77B, GE90-85B, GE90-90B, and GE90-94B turbofan engines with high-pressure compressor (HPC) stage 8-10 spool, part numbers (P/Ns) 1694M80G04, 1844M90G01, or 1844M90G02, installed. This proposed AD was prompted by reports of cracks found on the seal teeth of the HPC stage 8-10 spool. This proposed AD would require eddy current inspections (ECIs) or fluorescent penetrant inspections (FPIs) of the HPC stage 8-10 spool seal teeth and removing from service those parts that fail inspection. We are proposing this AD to prevent failure of the HPC stage 8-10 spool, uncontained rotor release, damage to the engine, and damage to the airplane.

## Notices in this docket

- Apr 11, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-08111, comments due Jun 10, 2016 (https://www.federalregister.gov/documents/2016/04/11/2016-08111/airworthiness-directives-general-electric-company-turbofan-engines)

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