# Proposed AD FAA-2012-0672: Saab AB, Saab Aerosystems Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-24-06
- Products: Saab AB, Saab Aerosystems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 27, 2012, 77 FR 38224
- Comments due: August 13, 2012
- Became: [AD 2012-24-06](https://openairdocs.org/ad/2012-24-06)
- Docket: FAA-2012-0672 (https://www.regulations.gov/docket/FAA-2012-0672, where comments are filed)
- Project: 2011-NM-261-AD
- FR document: 2012-15690
- Official PDF: https://openairdocs.org/files/sha256/39/04/390470efa92ef3d472a49e60c5233e8a888eec3822d0e30bcfb05852a0e2aae2 (from https://www.govinfo.gov/content/pkg/FR-2012-06-27/pdf/2012-15690.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/06/27/2012-15690/airworthiness-directives-saab-ab-saab-aerosystems-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/64B845D7F45568B686257A2A0062795D.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0672

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Saab AB, Saab Aerosystems Model 340A (SAAB/SF340A) and SAAB 340B airplanes. This proposed AD was prompted by reports of stall events during icing conditions which were not accompanied with a prior stall warning. This proposed AD would require replacing the stall warning computer (SWC) with a new SWC, and modifying the airplane for the replacement of the SWC. We are proposing this AD to prevent natural stall events when operating in icing conditions, which if not corrected may result in loss of control of the airplane.

## Notices in this docket

- Jun 27, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-15690, comments due Aug 13, 2012 (https://www.federalregister.gov/documents/2012/06/27/2012-15690/airworthiness-directives-saab-ab-saab-aerosystems-airplanes)

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