Hi @tridge
I am using AP 4.5.3 on ICE engine powered VTOL airplane.
I normally power on the flight controller and not getting any prearm error until I start the ICE engine.
When the movement I start the ICE engine immediately I got Prearm: Accel inconsistent.
I have tried many times and all are similar issues only.
AP 4.4.x I doesn’t see this problem .