# Proposed AD 95-ANE-56: Rolls-Royce plc RB.211-524 Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-07-04
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 13, 1996, 61 FR 58147
- Comments due: January 13, 1997
- Became: [AD 97-07-04](https://openairdocs.org/ad/97-07-04)
- Docket: 95-ANE-56
- FR document: 96-28983
- Official PDF: https://openairdocs.org/files/sha256/6f/c0/6fc08f2ad13e3baaed55e3190ba84d9f472c02b95a9b9753c3352d4897bc970e (from https://www.govinfo.gov/content/pkg/FR-1996-11-13/pdf/96-28983.pdf)
- Federal Register: https://www.federalregister.gov/documents/1996/11/13/96-28983/airworthiness-directives-rolls-royce-plc-rb211-524-series-turbofan-engines
- Page: https://openairdocs.org/proposed/95-ANE-56

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Rolls-Royce plc RB.211-524 series turbofan engines. This proposal would require initial and repetitive borescope inspections of the head section and meterpanel assembly of the combustion liner, and replacement, if necessary, with serviceable parts. In addition, this AD would propose an optional installation of a front combustion liner with a strengthened head section as a terminating action to the inspection requirements. This proposal is prompted by reports of engine fires due to premature engine combustor distress. The actions specified by the proposed AD are intended to prevent engine combustor liner deterioration due to thermal fatigue, which can result in combustor liner and case burn-through and engine fire.

## Notices in this docket

- Nov 13, 1996: Notice of proposed rulemaking (NPRM). (first notice), FR document 96-28983, comments due Jan 13, 1997 (https://www.federalregister.gov/documents/1996/11/13/96-28983/airworthiness-directives-rolls-royce-plc-rb211-524-series-turbofan-engines)

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