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FAA Grounds All Cirrus Vision Jets over Angle of Attack Issues
The FAA issued an emergency airworthiness directive that grounds the Cirrus SF50 Vision Jet due to issues with the airplane's angle-of-attack and stall protection systems. (www.flyingmag.com) 更多...Sort type: [Top] [Newest]
excellent action BY FAA
Good point that you raise David. Certainly also true for Lears and the Lockheed Jetstar Model 1329.
I see the AOA sensors on both the 737max and the Cirrus as having very small vanes, with little lever arm to overcome any stickiness in the mechanism. I remember long arms, resembling a weather vane, on older airliners; the longer lever arm on these older sensors may exhibit a bit more drag, but it seems to me that the long lever arm makes them less likely to get stuck. I'd live to hear the opinion of a mechanical engineer, especially one who has designed AOA sensors.
As a frequent business traveler (Well over 1,500 flights) and aviation enthusiast, I really appreciate the FlightAware board. This particular discussion is one of the best I can remember in some time and speaks to all of the right issues: Culture, Mechanics, Safety, Technology and Automation. Let's hope that manufactures, regulators, instructors and pilots consider all of these issues when deciding what to build, approve and fly. Thanks to you all for a forum that allows a non-expert to learn and participate.
This may be slightly off topic but in the Lockheed Jetstar you had the facility to check each of the dual stick shakers and also each of the dual stick pushers individually. Just saying.
Well at least the chute didn't deploy.