What was found
INSTALLED A NEW LANDING GEAR POWER PACK. PERFORMED SEVERAL GEAR SWINGS, NO DEFECTS FOUND. AIRCRAFT FLEW A FEW TRIPS, NO PROBLEMS. THE POWER PACK FAILED ON THE LAST FLIGHT. AFTER TROUBLESHOOTING THE SYSTEM, THE POWERPACK WAS INOP. INSTALLED AN EXCHANGED POWER PACK FROM THE SAME COMPANY. SWUNG THE GEAR SEVERAL TIMES, NO DEFECTS FOUND. FLIGHT CHECK OPERATION, CHECKED OK.