# Airworthiness Directives; Rolls-Royce plc RB211-524 and -535 Series Turbofan Engines
> **Rule** · Final rule. · Published 2007-07-12 · Effective 2007-08-16 · 72 FR 38002
## Document
- **Document number:** E7-13410
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc RB211-524 and -535 Series Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 72 FR 38002
- **Publication date:** 2007-07-12
- **Effective date:** 2007-08-16
- **FAA docket:** Docket No. FAA-2006-24325
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Rolls-Royce plc (RR) RB211-524 and -535 series turbofan engines. This AD requires initial and repetitive fluorescent penetrant inspections (FPI) of the high pressure (HP) compressor stage 1 and 2 rotor discs for cracks. This 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 issuing this AD to prevent uncontained engine failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/07/12/E7-13410/airworthiness-directives-rolls-royce-plc-rb211-524-and--535-series-turbofan-engines)
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