# Proposed AD 99-NE-38-AD: Dowty Aerospace Propellers R391-6-132- F/3 Series Propellers

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 28, 1999, 64 FR 72586
- Comments due: January 27, 2000
- Docket: 99-NE-38-AD
- FR document: 99-33572
- Official PDF: https://openairdocs.org/files/sha256/ee/1e/ee1e98958d6936e78f9aed5a28adf0e8b0f9feaa4a72ae05283680b273316c30 (from https://www.govinfo.gov/content/pkg/FR-1999-12-28/pdf/99-33572.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/12/28/99-33572/airworthiness-directives-dowty-aerospace-propellers-r391-6-132--f3-series-propellers
- Page: https://openairdocs.org/proposed/99-NE-38-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Dowty Aerospace Propellers R391-6- 132-F/3 series propellers. This proposal would require installation of an improved overspeed governor. This proposal is prompted by reports of overspeed governor failure. The actions specified by the proposed AD are intended to prevent overspeed governor failure, which could result in propeller overspeed, vibration, possible loss of propeller integrity, and loss of control of the airplane.

## Notices in this docket

- Dec 28, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-33572, comments due Jan 27, 2000 (https://www.federalregister.gov/documents/1999/12/28/99-33572/airworthiness-directives-dowty-aerospace-propellers-r391-6-132--f3-series-propellers)

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