Shoutout to the Honeywell tech who walked me through a dead ADIRU over the phone at 2am
Had a bad ADIRU on a King Air 350 at a remote strip outside Flagstaff last Thursday, no replacement unit for 200 miles and a plane full of people waiting on me. Spent 90 minutes chasing a wiring fault that turned out to be nothing, then the Honeywell support guy had me reseat the connector and cycle power in a specific order I'd never tried, and it came right back up. Is there a cheat sheet anywhere for these power-up sequences, or does everyone just learn them the hard way like I did?