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Old 28th Nov 2021, 08:32
  #55 (permalink)  
PDR1
 
Join Date: Nov 2015
Location: Mordor
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Originally Posted by NutLoose
They rectified the problem by adding extra batteries to supply the Fadec in an emergency, see

http://support.diamond-air.at/filead...cl-EASA-AD.pdf
Most battery failure modes are age and environment related, so unless one battery is explicitly required to be half the age of the other there's a high-ish probability that both will be dead on that cold winter morning when the driver wants to fly.

I guess people missed the fact that the cause if the DA42 crash wasn't the battery or the engine failures - it was the driver. The manual said starting both batteries from a ground power unit was verbotten, but the driver knew better. I can see no justification for believing that drivers will pay attention to the battery states and condition monitoring requirements that are an inherent part of this solution. You can always tell a pilot, but you can't tell him much...

PDR
Last edited by PDR1; 28th Nov 2021 at 09:13.
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