# Proposed AD FAA-2015-4023: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-06-14
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 17, 2015, 80 FR 71747
- Comments due: January 19, 2016
- Became: [AD 2016-06-14](https://openairdocs.org/ad/2016-06-14)
- Docket: FAA-2015-4023 (https://www.regulations.gov/docket/FAA-2015-4023, where comments are filed)
- Project: 2015-NE-29-AD
- FR document: 2015-28898
- Official PDF: https://openairdocs.org/files/sha256/7c/7a/7c7a8e3d0cf4e3f3601c3607c1c5a39582be64443f498c072b382f39a2e2fd36 (from https://www.govinfo.gov/content/pkg/FR-2015-11-17/pdf/2015-28898.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/11/17/2015-28898/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0812E51C74A7FA4286257F00004D4AB4.0001
- Page: https://openairdocs.org/proposed/FAA-2015-4023

## Summary

We propose to adopt a new airworthiness directive (AD) for all General Electric Company (GE) CF6-80E1 turbofan engines with rotating compressor discharge pressure (CDP) seal, part number (P/N) 1669M73P02, installed. This proposed AD was prompted by reports from the manufacturer of cracks in the teeth of two rotating CDP seals found during engine shop visits. This proposed AD would require stripping of the coating, inspecting, and recoating the teeth of the affected rotating CDP seals. We are proposing this AD to prevent cracking of the CDP seal teeth, which can lead to uncontained part release, damage to the engine, and damage to the airplane.

## Notices in this docket

- Nov 17, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-28898, comments due Jan 19, 2016 (https://www.federalregister.gov/documents/2015/11/17/2015-28898/airworthiness-directives-general-electric-company-turbofan-engines)

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