Likewise with a large recip that uses ADI.
Ah! the R2800's...Now that was an engine and a half..I recall taking off in the Convair 440 (RAAF) at Canberra and for some reason the copilot switched off the ADI before I asked him. Politely asked him to check with me first and he said sorry and switched it back on again. Now I am not sure whether there was a big bang or not because I also had the same thing happened in either a RAAF Viscount or an HS 748 whilst using water methanol and that WAS a big bang.