Any idea where the CV580 attitude indicators get their power and attitude data from?
Where the standby attitude indicator (if any?) was located on the panel?
Was it an upgrade EFIS panel?
Maybe someone can post this info and even a photo of the CV580 panel - i.e. as used in this fleet.
Sudden loss of even one attitude indicator in a very dynamic cell can cause mental mayhem. Upset conditions can develop in mere seconds and soon become irrecoverable. Structural failure soon follows (earlier than you'd think due to the asymmetric g induced in attempted recovery from a classic spiral).
It only takes a lightning strike and a bit of substandard airframe bonding....and electrical systems can take a real hit. Been there.