# Airworthiness Directives; Rolls-Royce plc RB211 Trent 500, 700 and 800 Series Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2006-03-01 · Effective 2006-03-16 · 71 FR 10415
## Document
- **Document number:** 06-1827
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 71 FR 10415
- **Publication date:** 2006-03-01
- **Effective date:** 2006-03-16
- **FAA docket:** Docket No. FAA-2006-23604, Directorate Identifier 2005-NE-49-AD
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce plc (RR) RB211 Trent 500, 700, and 800 series turbofan engines. This AD requires inspecting all engines to determine those that are equipped with a suspect oil filler cap assembly. This AD also requires, within seven days of the effective date of this AD, an initial and repetitive check of oil cap security following oil servicing of multiple-engine airplanes having more than one suspect oil filler cap assembly installed. Finally, this AD requires replacing affected oil filler cap assemblies. This AD results from four in- service oil loss events since March 2005, following failures to properly install the oil tank filler cap after oil servicing. We are issuing this AD to prevent oil loss that could result in multiple engine in-flight shutdowns during a flight.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/03/01/06-1827/airworthiness-directives-rolls-royce-plc-rb211-trent-500-700-and-800-series-turbofan-engines)
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