# Proposed AD 99-NE-15-AD: Allison Engine Company, Inc. AE 3007A and AE 3007C Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-13-01
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 5, 1999, 64 FR 42622
- Comments due: October 4, 1999
- Became: [AD 2000-13-01](https://openairdocs.org/ad/2000-13-01)
- Docket: 99-NE-15-AD
- FR document: 99-20183
- Official PDF: https://openairdocs.org/files/sha256/cd/05/cd05d2c20ebaf2603b54d2029d67081c99ae56cb1deacab0933237495e4f0eae (from https://www.govinfo.gov/content/pkg/FR-1999-08-05/pdf/99-20183.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/08/05/99-20183/airworthiness-directives-allison-engine-company-inc-ae-3007a-and-ae-3007c-turbofan-engines
- Page: https://openairdocs.org/proposed/99-NE-15-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Allison Engine Company, Inc. AE 3007A and AE 3007C series turbofan engines. This proposal would require removing certain turbine wheels from service before exceeding new, reduced cyclic life limits. This proposal is prompted by a refined life analysis that was performed by the manufacturer. The actions specified by the proposed AD are intended to prevent an uncontained turbine wheel failure, which could result in damage to the airplane.

## Notices in this docket

- Aug 5, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-20183, comments due Oct 4, 1999 (https://www.federalregister.gov/documents/1999/08/05/99-20183/airworthiness-directives-allison-engine-company-inc-ae-3007a-and-ae-3007c-turbofan-engines)

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