# Airworthiness Directives; Rolls-Royce Corporation Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2011-11-02 · Effective 2011-11-17 · 76 FR 67591
## Document
- **Document number:** 2011-28352
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce Corporation Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 76 FR 67591
- **Publication date:** 2011-11-02
- **Effective date:** 2011-11-17
- **FAA docket:** Docket No. FAA-2011-0273
## Abstract

We are adopting a new airworthiness directive (AD) for Rolls- Royce Corporation (RRC) AE 3007A, AE 3007A1/1, AE 3007A1, AE 3007A1/3, AE 3007A1E, AE 3007A1P, and AE 3007A3 turbofan engines. This AD requires initial and repetitive eddy current inspections (ECI) of certain 6th-through-13th stage compressor wheel knife edge seals, and initial and repetitive ECIs of the compressor wheel outer circumference, for cracks. This AD was prompted by reports of low-cycle fatigue cracks found during shop visits, in the 6th-through-13th stage compressor wheels having chrome-carbide coated or uncoated knife edge seals. We are issuing this AD to prevent uncontained failure of the 6th-through-13th stage compressor wheel, leading to damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/11/02/2011-28352/airworthiness-directives-rolls-royce-corporation-turbofan-engines)
---
*AI Analytics · CC0 1.0*