What was found
INSTALLED OVERHAULED ATTITUDE INDICATOR. WITHIN 5 HOURS, UNIT SHOWED SIGNS OF BEING UNSTABLE IN-FLIGHT SUCH AS AUTOPILOT WOULD NOT STAY ENGAGED; THEN, INDICATOR GOT WORSE AND NOW WILL ROLL OVER IN-FLIGHT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
INSTALLED OVERHAULED ATTITUDE INDICATOR. WITHIN 5 HOURS, UNIT SHOWED SIGNS OF BEING UNSTABLE IN-FLIGHT SUCH AS AUTOPILOT WOULD NOT STAY ENGAGED; THEN, INDICATOR GOT WORSE AND NOW WILL ROLL OVER IN-FLIGHT.