# Proposed AD FAA-2006-25983: MD Helicopters, Inc. Model MD900 Series Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-08-11
- Products: MD Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 17, 2006, 71 FR 60927
- Comments due: December 18, 2006
- Became: [AD 2008-08-11](https://openairdocs.org/ad/2008-08-11)
- Docket: FAA-2006-25983 (https://www.regulations.gov/docket/FAA-2006-25983, where comments are filed)
- Project: 2006-SW-11-AD
- FR document: E6-17186
- Official PDF: https://openairdocs.org/files/sha256/2b/26/2b261239cd9bcefb37832e26719b77787a6f8938d9f8b68d88179758bb245651 (from https://www.govinfo.gov/content/pkg/FR-2006-10-17/pdf/E6-17186.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/10/17/E6-17186/airworthiness-directives-md-helicopters-inc-model-md900-series-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F2FCAC98B5B389B38625720A006430C6.0001
- Page: https://openairdocs.org/proposed/FAA-2006-25983

## Summary

This document proposes adopting a new airworthiness directive (AD) for MD Helicopters, Inc. (MDHI) Model MD900 series helicopters. The AD would require modifying the pilot and co-pilot dual-control directional pedal assemblies, or the pilot single-control directional pedal assembly (directional control pedal assembly). This proposal is prompted by an accident which has been attributed to loss of directional control due to failure of the welds in the directional control pedal assembly. The actions specified by the proposed AD are intended to prevent fatigue cracking in the welds that connect the directional control pedal to the pedal shaft, resulting in loss of directional control and subsequent loss of control of the helicopter.

## Notices in this docket

- Oct 17, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-17186, comments due Dec 18, 2006 (https://www.federalregister.gov/documents/2006/10/17/E6-17186/airworthiness-directives-md-helicopters-inc-model-md900-series-helicopters)

---
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.