# Proposed AD FAA-2004-19449: McDonnell Douglas Model MD-11 and MD-11F Airplanes Equipped With Pratt & Whitney PW4000 Series Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-02-06
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 27, 2004, 69 FR 62629
- Comments due: December 13, 2004
- Became: [AD 2005-02-06](https://openairdocs.org/ad/2005-02-06)
- Docket: FAA-2004-19449 (https://www.regulations.gov/docket/FAA-2004-19449, where comments are filed)
- Project: 2004-NM-07-AD
- FR document: 04-24032
- Official PDF: https://openairdocs.org/files/sha256/e8/52/e8527bdb43978edad8891e221609c5f276a2752cd3a833a34b0b06911b7234db (from https://www.govinfo.gov/content/pkg/FR-2004-10-27/pdf/04-24032.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/10/27/04-24032/airworthiness-directives-mcdonnell-douglas-model-md-11-and-md-11f-airplanes-equipped-with-pratt-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FEFDA270D2D8CC0986256F3A005A9BE1.0001
- Page: https://openairdocs.org/proposed/FAA-2004-19449

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain McDonnell Douglas Model MD-11 and MD-11F airplanes equipped with Pratt & Whitney PW4000 series engines. This proposed AD would require, for each engine, replacing, with a tube assembly, the existing hose assembly that connects the oil pressure transmitter to the main oil circuit. This proposed 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 proposing 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.

## Notices in this docket

- Oct 27, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-24032, comments due Dec 13, 2004 (https://www.federalregister.gov/documents/2004/10/27/04-24032/airworthiness-directives-mcdonnell-douglas-model-md-11-and-md-11f-airplanes-equipped-with-pratt-and)

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