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Steve Taranovich

Aircraft: Angle of Attack (A0A) Sensor design

Steve Taranovich
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BillWM
BillWM
5/19/2019 2:56:21 PM
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Re: Maybe what would be best is redundant dissimilar AOA sensing methods for each sensor
Did some checking and these sensors and the airspeed sensors in the last 20 years are linked to an Airbus A300 incident off of Brazil, an A320 series Aircraft In Europe and the two 737MAX losses.   Seems worth researching -- The FAA/CAA/NTSB human factors analysis that these are recoverable faults must be missing something ---

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emma8374
emma8374
5/17/2019 5:04:43 PM
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Re: Maybe what would be best is redundant dissimilar AOA sensing methods for each sensor
nice work

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steve.taranovich
steve.taranovich
5/15/2019 10:50:07 PM
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Re: Maybe what would be best is redundant dissimilar AOA sensing methods for each sensor
@BillWM---that's an idea---we need to have more possibilities discussed like that and then test and choose from there

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BillWM
BillWM
5/15/2019 8:50:14 PM
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Maybe what would be best is redundant dissimilar AOA sensing methods for each sensor
Maybe what would be best is redundant dissimilar AOA sensing methods for each sensor  -- Perhaps one the Vane and Shaft like there is now, and the other perhaps vector based pressure ports on a fixed metal protrusion or some other non-blade and shaft method.

 

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steve.taranovich
steve.taranovich
5/15/2019 8:42:37 PM
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Re: AOA sensors have to have part of the sensor out in the elements
@BillWM---You're right. DO-160 tests salt, fungus, fluids, sand, dust....not bird strikes or mechanical damage in docking and undocking the aircraft. I just think we need to be more innovative in our design approach to ruggedize the sensor by minimalizing mechanical aspects of the product where we can. From what I gather, it's not an electronic failure, but more of a physical/mechanical/movement error from bird 'gunk' or physical damage failure to the AOA from docking and gate departures.

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BillWM
BillWM
5/15/2019 7:00:22 PM
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AOA sensors have to have part of the sensor out in the elements
AOA Sensors have to have part of the sensor out in the elements -- This means they are subject to bird strikes(the Ethiopian case), Paint, Masking Tape, DeIcer, Ice, Hail, runway debris, and other effects -- I am pretty sure that RTCA DO-160 does not address bird strikes, debris, de-icer, and hail -- This leaves these into the TSO for the sensor which is RTCA/FAA/CAA/ICAO  -- The real key is having the complete and correct requirements for the AOA sensor design team.

 

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