# Airworthiness Directives; Rolls-Royce plc Turbofan Engines
> **Rule** · Final rule. · Published 2013-10-03 · Effective 2013-11-07 · 78 FR 61168
## Document
- **Document number:** 2013-23448
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 61168
- **Publication date:** 2013-10-03
- **Effective date:** 2013-11-07
- **FAA docket:** Docket No. FAA-2013-0052
## Abstract

We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211-535E4-37, RB211-535E4-B-37, RB211-535E4-C- 37, and RB211-535E4-B-75 turbofan engines. This AD requires removal of affected parts using a drawdown plan. This AD was prompted by RR updating the low-cycle-fatigue life analysis for the low pressure turbine (LPT) stage 2 discs. We are issuing this AD to prevent LPT stage 2 disc failure, which could result in uncontained engine damage and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/10/03/2013-23448/airworthiness-directives-rolls-royce-plc-turbofan-engines)
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