# Proposed AD 2001-NM-335-AD: Raytheon Model Beech 400A and 400T Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-10-13
- Products: Raytheon
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 24, 2003, 68 FR 8563
- Comments due: April 10, 2003
- Became: [AD 2003-10-13](https://openairdocs.org/ad/2003-10-13)
- Docket: 2001-NM-335-AD
- FR document: 03-4234
- Official PDF: https://openairdocs.org/files/sha256/d3/7f/d37f054c3ee6b562903fad5711024110d3a622aed96c2a246d924fc04701f942 (from https://www.govinfo.gov/content/pkg/FR-2003-02-24/pdf/03-4234.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/02/24/03-4234/airworthiness-directives-raytheon-model-beech-400a-and-400t-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D5C82D497985B72E86256CD700569660.0001
- Page: https://openairdocs.org/proposed/2001-NM-335-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Raytheon Model Beech 400A and 400T series airplanes. This proposal would require replacement of the low-pressure oxygen tubing located in the forward fuselage (nose avionics bay), lower forward flight deck, and lower forward cabin areas, as applicable, with new low-pressure oxygen tubing. This action is necessary to prevent leakage of oxygen from scored low-pressure oxygen tubing, which could result in lack of available oxygen for the flightcrew, or possible explosion or fire. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Feb 24, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-4234, comments due Apr 10, 2003 (https://www.federalregister.gov/documents/2003/02/24/03-4234/airworthiness-directives-raytheon-model-beech-400a-and-400t-series-airplanes)

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