What was found
LEFT MAIN GEAR DID NOT FULLY RETRACT AFTER TAKEOFF. AFTER RAISING FLAPS, GEAR FINISHED RETRACTING AND RED LIGHTS EXTINGUISHED. R & R LT MLG FWD INBD DOOR SEQUENCE VALVE STRIKER. PERFORMED SEVERAL GEAR SWINGS AND FREE FALL AS REQUIRED. ALL LANDING GEAR INDICATIONS, OP CHECK GOOD AT THIS TIME ON GROUND OPERATIONS.