# Proposed AD 99-NE-07-AD: Allison Engine Company AE 3007A and AE 3007C Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-11-22
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 17, 1999, 64 FR 44667
- Comments due: September 16, 1999
- Became: [AD 2000-11-22](https://openairdocs.org/ad/2000-11-22)
- Docket: 99-NE-07-AD
- FR document: 99-21331
- Official PDF: https://openairdocs.org/files/sha256/9d/61/9d612280f9e20aa4bc5cf207720c4e4d37ccbc18eb26f247fca514b2ddcaed41 (from https://www.govinfo.gov/content/pkg/FR-1999-08-17/pdf/99-21331.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/08/17/99-21331/airworthiness-directives-allison-engine-company-ae-3007a-and-ae-3007c-series-turbofan-engines
- Page: https://openairdocs.org/proposed/99-NE-07-AD

## Summary

This proposal would require revisions to the Airworthiness Limitations Section of the Allison Engine Company AE 3007A and AE 3007C Engine Manuals to include required enhanced inspection of selected critical life-limited parts at each piece-part exposure. This proposal would also require an air carrier's approved continuous airworthiness maintenance program to incorporate these inspection procedures. Air carriers with an approved continuous airworthiness maintenance program would be allowed to either maintain the records showing the current status of the inspections using the record keeping system specified in the air carrier's maintenance manual, or establish an acceptable alternate method of record keeping. This proposal is prompted by an FAA study of in-service events involving uncontained failures of critical rotating engine parts that indicated the need for improved inspections. The improved inspections are needed to identify those critical rotating parts with conditions, which if allowed to continue in service, could result in uncontained failures. The actions specified by this proposed AD are intended to prevent critical life-limited rotating engine part failure, which could result in an uncontained engine failure and damage to the airplane.

## Notices in this docket

- Aug 17, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-21331, comments due Sep 16, 1999 (https://www.federalregister.gov/documents/1999/08/17/99-21331/airworthiness-directives-allison-engine-company-ae-3007a-and-ae-3007c-series-turbofan-engines)

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