# Proposed AD 2001-NE-01-AD: Rolls-Royce Corporation (Formerly Allison Engine Company) 501-D Series Turboprop Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-07-02
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 22, 2006, 71 FR 9048
- Comments due: April 24, 2006
- Became: [AD 2003-07-02](https://openairdocs.org/ad/2003-07-02)
- Docket: 2001-NE-01-AD
- FR document: E6-2454
- Official PDF: https://openairdocs.org/files/sha256/ac/b8/acb886ba6f97d48d84beb691628880232b14f8858dbe84e33c6d09b86c44d099 (from https://www.govinfo.gov/content/pkg/FR-2006-02-22/pdf/E6-2454.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/02/22/E6-2454/airworthiness-directives-rolls-royce-corporation-formerly-allison-engine-company-501-d-series
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/684E5506A22288618625711D00529C57.0001
- Page: https://openairdocs.org/proposed/2001-NE-01-AD

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) for Rolls-Royce Corporation (formerly Allison Engine Company) (RRC) 501-D series turboprop engines. That AD currently requires removal from service of certain turbine rotor components at reduced life limits. This proposed AD would require the same actions but adds two new life limits. This proposed AD results from RRC reevaluating and revising component life limits for 501-D22 series turboprop engines. We are proposing this AD to prevent uncontained turbine rotor failure resulting in an in-flight engine shutdown and possible damage to the airplane.

## Notices in this docket

- Oct 18, 2002: Notice of proposed rulemaking (NPRM). (first notice), FR document 02-26587, comments due Dec 17, 2002 (https://www.federalregister.gov/documents/2002/10/18/02-26587/airworthiness-directives-rolls-royce-corporation-formerly-allison-engine-company-501-d-series)
- Feb 22, 2006: Notice of proposed rulemaking (NPRM)., FR document E6-2454, comments due Apr 24, 2006 (https://www.federalregister.gov/documents/2006/02/22/E6-2454/airworthiness-directives-rolls-royce-corporation-formerly-allison-engine-company-501-d-series)

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