What was found
AIRCRAFT LANDED AT BOISE, IDAHO WITH THE NOSE AND THE RIGHT MAIN LANDING GEAR EXTENDED WHILE THE LEFT MAIN LANDING GEAR REMAINED IN THE RETRACTED POSITION. INSPECTION OF THE LEFT HAND LANDING GEAR REVEALED THE PIN, PN MY20248-001 WHICH IS PART OF THE FORWARD GEAR DOOR LOCK, PN VTS4424, TO BE CORRODED (RUSTED) AT POINT OF ROTATION, AND CRACKED FOR SOME PERIOD. PIN FINALLY FAILED. SUBMITTER STATED THIS MAY HAVE BEEN PREVENTED BY A MORE DETAILED INSPECTION OF THE LANDING GEAR DOOR LOCKS. (X)