# Airworthiness Directives; Rolls-Royce, plc RB211 Trent 800 Series Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 1998-09-22 · Effective 1998-10-07 · 63 FR 50484
## Document
- **Document number:** 98-25006
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 63 FR 50484
- **Publication date:** 1998-09-22
- **Effective date:** 1998-10-07
- **FAA docket:** Docket No. 98-ANE-33-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to Rolls-Royce, plc RB211 Trent 800 series turbofan engines. This action requires initial and repetitive ultrasonic inspections of fan blade roots for cracks, and replacement, if necessary, with serviceable parts. This amendment is prompted by reports of multiple fan blade root cracks in several factory test engines. The actions specified in this AD are intended to prevent fan blade failure, which could result in multiple fan blade release, uncontained engine failure, and possible damage to the aircraft.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/09/22/98-25006/airworthiness-directives-rolls-royce-plc-rb211-trent-800-series-turbofan-engines)
---
*AI Analytics · CC0 1.0*