# Airworthiness Directives; McDonnell Douglas Model MD-11 and MD-11F Airplanes Equipped With Pratt & Whitney PW4000 Series Engines
> **Rule** · Final rule. · Published 2005-01-31 · Effective 2005-03-07 · 70 FR 4758
## Document
- **Document number:** 05-1516
- **Category:** airworthiness
- **Manufacturer:** McDonnell Douglas Model MD-11 and MD-11F
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 4758
- **Publication date:** 2005-01-31
- **Effective date:** 2005-03-07
- **FAA docket:** Docket No. FAA-2004-19449
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain McDonnell Douglas Model MD-11 and MD-11F airplanes equipped with Pratt & Whitney PW4000 series engines. This AD requires, for each engine, replacing, with a tube assembly, the existing hose assembly that connects the oil pressure transmitter to the main oil circuit. This AD is prompted by a report indicating that, for each engine, the existing hose assembly does not meet zero-flow fireproof capability requirements. We are issuing this AD to prevent, if there is an engine fire, failure of the oil pressure indicator and the low-oil pressure warning, which could result in an unannounced shutdown of that engine; and oil leakage, which may feed the engine fire.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/01/31/05-1516/airworthiness-directives-mcdonnell-douglas-model-md-11-and-md-11f-airplanes-equipped-with-pratt-and)
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