# Airworthiness Directives; Rolls-Royce plc Turbofan Engines
> **Rule** · Final rule. · Published 2017-12-11 · Effective 2018-01-16 · 82 FR 58107
## Document
- **Document number:** 2017-26572
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 58107
- **Publication date:** 2017-12-11
- **Effective date:** 2018-01-16
- **FAA docket:** Docket No. FAA-2017-1117
## Abstract

We are superseding airworthiness directive (AD) 2014-24-08 for all Rolls-Royce plc (RR) RB211-535E4-37, RB211-535E4-B-37, and RB211- 535E4-C-37 turbofan engines with certain low-pressure (LP) fuel filter- to-high-pressure (HP) fuel pump tube assemblies, or HP fuel pump-to- fuel flow governor (FFG) or FFG-to-HP pump inlet overspill return tube assemblies and flanged adaptor, installed. AD 2014-24-08 required replacing certain LP fuel filter-to-HP fuel pump tube assemblies. This AD retains the requirement in AD 2014-24-08 to remove the LP fuel filter-to-HP fuel pump tube, adds new compliance thresholds, and requires installation of new HP fuel pump-to-FFG and FFG-to-HP pump inlet overspill return tube assemblies and flanged adaptor. This AD was prompted by fuel leaks that have occurred at the flanged joints of the HP fuel pump-to-FFG tube assembly and FFG-to-HP pump inlet overspill return tube assembly. We are issuing this AD to correct the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/12/11/2017-26572/airworthiness-directives-rolls-royce-plc-turbofan-engines)
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