What was found
LEFT MAIN LANDING GEAR WILL NOT RETRACT, 2 RED INTRANSIT LIGHTS REMAIN ILLUMINATED. HYD PUMP RUNS AND THERE WAS NOISE FROM THE LEFT GEAR. RETURNED TO FIELD. INSPECTED LEFT MAIN GEAR IAW MM 32-32-00 AND ACCOMPLISHED GEAR RETRACTION TEST IAW MM 32-30-00, OPS NORMALLY AT THIS TIME.