# Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2013-01-10 · Effective 2013-01-10 · 78 FR 2195
## Document
- **Document number:** 2012-31588
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce Deutschland Ltd & Co KG Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 78 FR 2195
- **Publication date:** 2013-01-10
- **Effective date:** 2013-01-10
- **FAA docket:** Docket No. FAA-2012-1202
## Abstract

We are adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 turbofan engines. This AD requires a one-time removal from service of the high-pressure (HP) compressor stages 1 to 6 rotor disc assembly before exceeding certain thresholds. This AD was prompted by a report of silver chloride-induced stress corrosion cracking of the HP compressor stages 1 to 6 rotor disc assembly, identified during overhaul. We are issuing this AD to prevent failure of the HP compressor stages 1 to 6 rotor disc assembly, which could result in uncontained failure of the engine and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/01/10/2012-31588/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-turbofan-engines)
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