# Proposed AD FAA-2009-0143: General Electric Company GE90-110B1, GE90-113B, and GE90-115B Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-25-14
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 24, 2009, 74 FR 30020
- Comments due: August 24, 2009
- Became: [AD 2009-25-14](https://openairdocs.org/ad/2009-25-14)
- Docket: FAA-2009-0143 (https://www.regulations.gov/docket/FAA-2009-0143, where comments are filed)
- Project: 2009-NE-05-AD
- FR document: E9-14807
- Official PDF: https://openairdocs.org/files/sha256/c7/0f/c70f5409faa7dfeaa855e6a35a9ae79eb9cb3277396a4b78df390fd7202867ac (from https://www.govinfo.gov/content/pkg/FR-2009-06-24/pdf/E9-14807.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/06/24/E9-14807/airworthiness-directives-general-electric-company-ge90-110b1-ge90-113b-and-ge90-115b-series-turbofan
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0E98F10A1BA94993862575DF004E2C26.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0143

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for General Electric Company (GE) GE90-110B1, GE90-113B, and GE90-115B series turbofan engines with stage 6 low-pressure turbine (LPT) blades, part number (P/N) 1765M37P03 or P/N 1765M37P04, installed. This proposed AD would require initial and repetitive inspections for shroud interlock wear of the stage 6 LPT blades. This proposed AD would also require replacing those blades with stage 6 LPT blades eligible for installation at the next engine shop visit as terminating action to the repetitive blade inspections. This proposed AD results from eight reports of GE90-115B stage 6 LPT single-blade separation events. We are proposing this AD to prevent failure of stage 6 LPT blades, which could result in uncontained engine failure and damage to the airplane.

## Notices in this docket

- Jun 24, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-14807, comments due Aug 24, 2009 (https://www.federalregister.gov/documents/2009/06/24/E9-14807/airworthiness-directives-general-electric-company-ge90-110b1-ge90-113b-and-ge90-115b-series-turbofan)

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