# Airworthiness Directives; Rolls-Royce Deutschland GmbH (Formerly BMW Rolls-Royce GmbH) Model BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2001-02-02 · Effective 2001-02-20 · 66 FR 8752
## Document
- **Document number:** 01-2609
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 66 FR 8752
- **Publication date:** 2001-02-02
- **Effective date:** 2001-02-20
- **FAA docket:** Docket No. 2000-NE-54-AD
## Abstract

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2000-25-51 that was sent previously to all known U.S. owners and operators of Rolls-Royce Deutschland GmbH (formerly BMW Rolls-Royce GmbH) model BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 turbofan engines. This action requires that certain high pressure turbine (HPT) stage 1 disks, part numbers (P/N's) BRH20009, BRH20010, BRH12167, BRH12168, BRH12466, and BRH12467; and stage 2 disks, P/N's BRH19349 and BRH19350, be removed before exceeding the new reduced cyclic limit, and replaced with a serviceable disk. This amendment is prompted by a reduction of the life limit for several high pressure turbine (HPT) stage 1 and stage 2 disks. The actions specified in this AD are intended to prevent an uncontained failure of the HPT stage 1 or stage 2 disk due to exceeded life-cycle limits.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/02/02/01-2609/airworthiness-directives-rolls-royce-deutschland-gmbh-formerly-bmw-rolls-royce-gmbh-model)
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