# Airworthiness Directives; Raytheon Model Beech 400A and 400T Series Airplanes
> **Rule** · Final rule. · Published 2003-05-27 · Effective 2003-07-01 · 68 FR 28702
## Document
- **Document number:** 03-12843
- **Category:** airworthiness
- **Manufacturer:** Raytheon Model Beech 400A and 400T Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 68 FR 28702
- **Publication date:** 2003-05-27
- **Effective date:** 2003-07-01
- **FAA docket:** Docket No. 2001-NM-335-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Raytheon Model Beech 400A and 400T series airplanes, that requires 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/05/27/03-12843/airworthiness-directives-raytheon-model-beech-400a-and-400t-series-airplanes)
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