# Airworthiness Directives; The Boeing Company Model 757 Airplanes
> **Rule** · Final rule. · Published 2010-03-29 · Effective 2010-05-03 · 75 FR 15328
## Document
- **Document number:** 2010-5857
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company Model 757
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 75 FR 15328
- **Publication date:** 2010-03-29
- **Effective date:** 2010-05-03
- **FAA docket:** Docket No. FAA-2009-0795
## Abstract

We are adopting a new airworthiness directive (AD) for certain Model 757 airplanes. This AD requires inspecting to verify the part number of the low-pressure flex-hoses of the flightcrew and supernumerary oxygen system installed under the oxygen mask stowage box at a flightcrew and supernumerary oxygen mask location, and replacing with a new non-conductive low-pressure flex-hose of the oxygen system if necessary. This AD results from reports of a low-pressure flex-hose of a flightcrew oxygen system that burned through due to inadvertent electrical current from a short circuit in an adjacent audio select panel. We are issuing this AD to prevent inadvertent electrical current, which can cause the low-pressure flex-hose of a flightcrew or supernumerary oxygen system to melt or burn, resulting in oxygen system leakage and smoke or fire.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/03/29/2010-5857/airworthiness-directives-the-boeing-company-model-757-airplanes)
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