# Airworthiness Directives; Short Brothers Model SD3-60 SHERPA and SD3 SHERPA Series Airplanes
> **Rule** · Final rule. · Published 1998-02-05 · Effective 1998-03-12 · 63 FR 5876
## Document
- **Document number:** 98-2640
- **Category:** airworthiness
- **Manufacturer:** Short Brothers Model SD3-60 SHERPA and SD3 SHERPA Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 63 FR 5876
- **Publication date:** 1998-02-05
- **Effective date:** 1998-03-12
- **FAA docket:** Docket No. 97-NM-118-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to all Short Brothers Model SD3-60 SHERPA and SD3 SHERPA series airplanes, that requires removing the aluminum alloy oxygen pipe assembly and replacing it with a stainless steel assembly. This amendment is prompted by the issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent aluminum oxygen tubing from bursting and releasing a high- pressure oxygen flow into the passenger cabin, which could result in a fire hazard during flight.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/02/05/98-2640/airworthiness-directives-short-brothers-model-sd3-60-sherpa-and-sd3-sherpa-series-airplanes)
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