# Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Formerly Rolls-Royce Deutschland GmbH, formerly BMW Rolls-Royce GmbH) Models BR700-710A1-10 and BR700-710A2-20 Turbofan Engines
> **Rule** · Final rule. · Published 2005-10-21 · Effective 2005-11-25 · 70 FR 61229
## Document
- **Document number:** 05-20780
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 61229
- **Publication date:** 2005-10-21
- **Effective date:** 2005-11-25
- **FAA docket:** Docket No. 2000-NE-48-AD
## Abstract

The FAA is superseding an existing airworthiness directive (AD) for Rolls-Royce Deutschland Ltd & Co KG (RRD) (formerly Rolls- Royce Deutschland GmbH, formerly BMW Rolls-Royce GmbH) models BR700- 710A1-10 and BR700-710A2-20 turbofan engines. That AD currently requires initial and repetitive visual and ultrasonic inspections of fan discs, part numbers (P/Ns) BRR18803, BRR19248, and BRR20791 for cracks, and if necessary, replacement with serviceable parts. This ad requires those same inspections for discs having old design P/N fan blades installed, and, extends the inspection interval for fan discs having new design P/N fan blades installed. Also, this AD adds as optional terminating action to the inspections, installation of certain P/N new fan discs, certain P/N new fan blades, and engine fan speed (N1) Keep Out Zone software. This AD results from a revised RRD service bulletin (SB) that introduces relaxed inspection intervals for certain P/N combinations of fan discs and fan blades, and introduces improved design fan discs and fan blades.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/10/21/05-20780/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-formerly-rolls-royce-deutschland-gmbh)
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