As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MFG INSTALLED MICROTECHNA ELECTRIC ATTITUDE INDICATORS IN A FLEET OF 9 AIRCRAFT USED FOR FLIGHT TRAINING. AFTER 18 MONTHS, ONE ORIGINAL ATTITUDE INDICATOR IS STILL FUNCTIONING AFTER 500 HOURS (9) INSTRUMENTS AVERAGED 225 HOURS BEFORE FAILING THE FIRST TIME. (6) HAVE FAILED WITH AN AVERAGE OF 120 HOURS TSO. (3) AIRCRAFT HAVE BEEN GROUNDED WAITING FOR REPLACEMENT INTSTRUMENTS.