What was found
AFTER TAKEOFF, LEFT MAIN GEAR WOULD NOT RETRACT. VOLUME 1 PROCEDURE ACCOMPLISHED UNSUCCESSFUL. RETURNED TO DEPARTING STATION. AIRCRAFT RELEASED FOR FERRY. DOWN GEAR PER RELEASE NR GMM STANDARD PRACTICE 3122, 9/15/02. AIRCRAFT FERRIED TO EVERGREEN AIRCRAFT SERVICES TPI. AIRCRAFT WAS JACKED THE LANDING GEAR WAS CYCLED 4 TIME OPERATED NORMAL NO DEFECTS NOTED. PRECAUTIONARY CHANGE OF THE LANDING GEAR SELECTOR VALVE WAS ACCOMPLISHED IAW FIM 32-30-01-01 PERFORMED BITE TEST OF PSEU AND ALL LDG SENSORS INDICATED SATISFACTORY INSPECTED ALL LDG AND TASK 32-31-20 CONDITION NORMAL/LEAK CHECK NO LEAK FOUND. ALL GEAR RETRACT TIME TEST AND ALTERNATE GEAR EXTENSION TEST PER MM TASK 32-31-00 SATISFACTORY.