# Proposed AD FAA-2006-24325: Rolls-Royce plc RB211-524 and -535 Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-14-07
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 29, 2006, 71 FR 57449
- Comments due: November 28, 2006
- Became: [AD 2007-14-07](https://openairdocs.org/ad/2007-14-07)
- Docket: FAA-2006-24325 (https://www.regulations.gov/docket/FAA-2006-24325, where comments are filed)
- Project: 2006-NE-10-AD
- FR document: E6-16047
- Official PDF: https://openairdocs.org/files/sha256/35/fc/35fc425727e9815fb8f14b97b6b76e94563b7ec3b659bc2063e47903054f315f (from https://www.govinfo.gov/content/pkg/FR-2006-09-29/pdf/E6-16047.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/09/29/E6-16047/airworthiness-directives-rolls-royce-plc-rb211-524-and--535-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5EB82A64E31E627E862571F80054193D.0001
- Page: https://openairdocs.org/proposed/FAA-2006-24325

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Rolls-Royce plc (RR) RB211-524 and -535 series turbofan engines. This proposed AD would require initial and repetitive fluorescent penetrant inspections (FPI) and borescope inspections of the high pressure (HP) compressor stage 1 and 2 rotor discs for cracks. This proposed AD results from reports of low-cycle-fatigue cracks found at overhaul in the interface weld between the HP compressor stage 1 and 2 rotor disc. We are proposing this AD to prevent uncontained engine failure and damage to the airplane.

## Notices in this docket

- Sep 29, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-16047, comments due Nov 28, 2006 (https://www.federalregister.gov/documents/2006/09/29/E6-16047/airworthiness-directives-rolls-royce-plc-rb211-524-and--535-series-turbofan-engines)

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