# Proposed AD 98-NM-349-AD: Short Brothers Model SD3-30 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-18-09
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 28, 1999, 64 FR 34577
- Comments due: July 28, 1999
- Became: [AD 99-18-09](https://openairdocs.org/ad/99-18-09)
- Docket: 98-NM-349-AD
- FR document: 99-16335
- Official PDF: https://openairdocs.org/files/sha256/ad/03/ad031ca352cfa368873918c8223aa80f321f3a4a6a59fea9afc1b90c73d5c249 (from https://www.govinfo.gov/content/pkg/FR-1999-06-28/pdf/99-16335.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/06/28/99-16335/airworthiness-directives-short-brothers-model-sd3-30-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-349-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Short Brothers Model SD3- 30 series airplanes. This proposal would require modification of electrical wiring associated with heater components. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent failure of the autofeather system, which could result in reduced controllability of the airplane in the event of engine failure during takeoff.

## Notices in this docket

- Jun 28, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-16335, comments due Jul 28, 1999 (https://www.federalregister.gov/documents/1999/06/28/99-16335/airworthiness-directives-short-brothers-model-sd3-30-series-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.