# Proposed AD 2004-NE-19-AD: Rolls-Royce plc RB211-524 Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-26-05
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 18, 2004, 69 FR 28094
- Comments due: July 19, 2004
- Became: [AD 2004-26-05](https://openairdocs.org/ad/2004-26-05)
- Docket: 2004-NE-19-AD
- FR document: 04-11200
- Official PDF: https://openairdocs.org/files/sha256/e3/b4/e3b46bf34ce7545f13206836a3dada0200b1c07bd879a71d0c50f6584c32dd08 (from https://www.govinfo.gov/content/pkg/FR-2004-05-18/pdf/04-11200.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/05/18/04-11200/airworthiness-directives-rolls-royce-plc-rb211-524-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BB5CA257C358E01886256E98005801A6.0001
- Page: https://openairdocs.org/proposed/2004-NE-19-AD

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) for Rolls-Royce plc (RR) RB211-524 series turbofan engines. That AD currently requires 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, that AD allows an optional installation of a front combustion liner with a strengthened head section as a terminating action to the inspection requirements. This proposed AD 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, reduction of the inspection intervals of certain RB211-524 engine models that have not been repaired to RR Field Repair Scheme FRS5367/B, and a mandatory terminating action to be completed by a certain date. This proposed AD results from five events that are directly attributed to combustor head break-up and meterpanel failure which were found at overhaul inspection. At least one of these events resulted in a combustion case burn-through. We are proposing this AD to prevent engine combustion liner deterioration, which can result in combustion liner breakup, case burn-through, and engine fire.

## Notices in this docket

- May 18, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-11200, comments due Jul 19, 2004 (https://www.federalregister.gov/documents/2004/05/18/04-11200/airworthiness-directives-rolls-royce-plc-rb211-524-series-turbofan-engines)

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