As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) POWER SUPPLY WOULD STOP WORKING AFTER 15-20 MINUTES INTO FLIGHT, THE PULSE WOULD STOP BEING GENERATED AND THE ANTI COLLISION LIGHT WOULD STAY DIMLY LIT. REPLICATED SCENARIO IN HANGAR WITH GROUND POWER ON FOR 15 MINUTES, LIGHTLY TAPPED POWER SUPPLY BOX AND THE LIGHT WOULD STOP WORKING. TWO POWER SUPPLIES ON THIS AIRCRAFT WITH SAME PROBLEM.