What was found
WHEN PILOT SELECTED LANDING GEAR DOWN, LANDING GEAR CONTROL CIRCUIT BREAKER TRIPPED AND WOULD NOT RESET. PILOT MANUALLY EXTENDED THE LANDING GEAR. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED DAMAGED DIODE IN THE LANDING GEAR DOWN CIRCUIT, AT THE HYDRAULIC POWER PACK SOLENOID. PERFORMED SEVERAL GEAR RETRACTIONS AND TEST FLEW THE AIRCRAFT, LANDING GEAR OPERATED NORMALLY. (M)