# Proposed AD FAA-2010-1024: General Electric Company GE90-76B; GE90-77B; GE90-85B; GE90-90B; and GE90-94B Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-15-06
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 22, 2010, 75 FR 80370
- Comments due: February 7, 2011
- Became: [AD 2011-15-06](https://openairdocs.org/ad/2011-15-06)
- Docket: FAA-2010-1024 (https://www.regulations.gov/docket/FAA-2010-1024, where comments are filed)
- Project: 2010-NE-34-AD
- FR document: 2010-32156
- Official PDF: https://openairdocs.org/files/sha256/54/db/54db2c137dbe3ec421616e6c72af4479c24f58d3e9c7865a4d37e9e040d0fa53 (from https://www.govinfo.gov/content/pkg/FR-2010-12-22/pdf/2010-32156.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/12/22/2010-32156/airworthiness-directives-general-electric-company-ge90-76b-ge90-77b-ge90-85b-ge90-90b-and-ge90-94b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EBA7C7EC3DD9121486257801004E8369.0001
- Page: https://openairdocs.org/proposed/FAA-2010-1024

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD would require initial and repetitive fluorescent penetrant inspections (FPIs) and eddy current inspections (ECIs) of the high-pressure compressor rotor (HPCR) 8-10 stage spool, part numbers (P/Ns) 1844M90G01 and 1844M90G02, for cracks between the 9-10 stages, at each piece-part exposure. This proposed AD was prompted by cracks discovered on one HPCR 8-10 spool between the 9- 10 stages in the weld joint. We are proposing this AD to prevent failure of the HPCR 8-10 stage spool, uncontained engine failure, and damage to the airplane.

## Notices in this docket

- Dec 22, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-32156, comments due Feb 7, 2011 (https://www.federalregister.gov/documents/2010/12/22/2010-32156/airworthiness-directives-general-electric-company-ge90-76b-ge90-77b-ge90-85b-ge90-90b-and-ge90-94b)

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