What was found
GEAR HANDLE WAS MOVED TO "UP" POSITION, NOSE GEAR RETRACTED WHILE BOTH MAIN GEAR LIGHTS STAYED ILLUMINATED WITH GEAR "UNLOCK" LIGHT ON. MAIN GEAR CYCLED SEVERAL TIMES IN A 20-25 SECOND TIME PERIOD. FINALLY MAIN GEAR RETRACTED, AND UNLOCK LIGHT EXTINGUISHED. FOUND ALL LANDING GEAR STRUTS REQUIRING SERVICE. SERVICED NOSE GEAR UPPER AND LOWER CHAMBER AS REQUIRES, NO LEAKS NOTED. SERVICED BOTH MAINS AS REQUIRED. COMPLIED WITH GEAR SWING, OPS CHECKS GOOD.