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Old 31st Mar 2019, 15:42
  #2829 (permalink)  
GarageYears
 
Join Date: Jun 2009
Location: VA, USA
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Originally Posted by NAROBS
SOTBO/layman speculation - Both crashes, same aircraft, same system fault, same type of sensor involved, same environment i.e. low level in the tropics. So, assuming that all national aviation and air operator rules and regs are complied with as regards operations, that's leaves 1. heat, 2. insects or 3. peculiar air pressure variation. I suspect that duplicating the sensors won't eliminate 1 & 2. The solution to 1 is design and or materials to produce more resilient sensor with a bigger envelope of operation and to 2. guards/filters and/or ramped-up servicing/cleaning regimes for same.

N
Firstly, as it stands the cause of the second crash is unknown. Fingers pointing at MCAS are speculation, at least until the interim report is published. It may well be a better narrative than other options.

Notwithstanding that, the Ethiopian environment is way different than those that occurred with Lion Air. Check out the MSL altitude of both departure airfields...

Finally, the same AOA sensor is flying in several thousand 737NGs today. It doesn’t seem the sensor is likely to be to blame.

Truth is the Lion Air aircraft shouldn’t have been in service, given the maintenance log and lack of accurate documentation of issues with the aircraft on previous flights. As for Ethiopian we just don’t know any facts, other than the actual crash.

- GY
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