# Proposed AD FAA-2012-1127: Bell Helicopter Textron Canada (Bell) Model Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-08-06
- Products: Bell Helicopter Textron Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 22, 2012, 77 FR 64439
- Comments due: December 21, 2012
- Became: [AD 2013-08-06](https://openairdocs.org/ad/2013-08-06)
- Docket: FAA-2012-1127 (https://www.regulations.gov/docket/FAA-2012-1127, where comments are filed)
- Project: 2010-SW-035-AD
- FR document: 2012-25899
- Official PDF: https://openairdocs.org/files/sha256/57/62/5762f4070b1570532cd6e02c19e2ea471768987aee902469898cbb00c6f9c65c (from https://www.govinfo.gov/content/pkg/FR-2012-10-22/pdf/2012-25899.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/10/22/2012-25899/airworthiness-directives-bell-helicopter-textron-canada-bell-model-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3C7C360876BDE9F886257A9F004842A3.0001
- Page: https://openairdocs.org/proposed/FAA-2012-1127

## Summary

We propose to adopt a new airworthiness directive (AD) for Bell Model 430 helicopters, which would require replacing certain components of the air data system. This proposed AD is prompted by the discovery of incorrect indicated airspeed when the helicopter was tested to the cold temperature limits (-40 degrees centigrade) required for Category A operations. The proposed actions are intended to correct the published Vne and to correct the indicated airspeed.

## Notices in this docket

- Oct 22, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-25899, comments due Dec 21, 2012 (https://www.federalregister.gov/documents/2012/10/22/2012-25899/airworthiness-directives-bell-helicopter-textron-canada-bell-model-helicopters)

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