# Proposed AD 2002-SW-19-AD: Bell Helicopter Textron Canada Limited Model 427 Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-04-14
- Products: Bell Helicopter Textron Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 18, 2002, 67 FR 64325
- Comments due: December 17, 2002
- Became: [AD 2003-04-14](https://openairdocs.org/ad/2003-04-14)
- Docket: 2002-SW-19-AD
- FR document: 02-26592
- Official PDF: https://openairdocs.org/files/sha256/dd/48/dd4832377db13d00af91e0e66e4abdb573605fc9cc0d13eccfb9835c8767a314 (from https://www.govinfo.gov/content/pkg/FR-2002-10-18/pdf/02-26592.pdf)
- Federal Register: https://www.federalregister.gov/documents/2002/10/18/02-26592/airworthiness-directives-bell-helicopter-textron-canada-limited-model-427-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5F15CCA99895431686256C5600597C71.0001
- Page: https://openairdocs.org/proposed/2002-SW-19-AD

## Summary

This document proposes adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (Bell) Model 427 helicopters. This proposal would require replacing the hydraulic solenoid tee fitting (tee fitting) and tubes. This proposal is prompted by the manufacturer's discovery that tee fittings may be installed improperly and restrict hydraulic fluid flow. The actions specified by this proposed AD are intended to prevent restricted flow of hydraulic fluid to the flight control hydraulic actuators resulting in loss of hydraulic control, excessive stiffness in the flight controls, and a subsequent forced landing of the helicopter.

## Notices in this docket

- Oct 18, 2002: Notice of proposed rulemaking (NPRM). (first notice), FR document 02-26592, comments due Dec 17, 2002 (https://www.federalregister.gov/documents/2002/10/18/02-26592/airworthiness-directives-bell-helicopter-textron-canada-limited-model-427-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.