What was found
LANDING GEAR WOULD NOT RETRACT, RED TRANSIT LIGHTS CAME ON, BUT GEAR WOULD NOT MOVE. RETURNED TO SLC. REPLACED LANDING GEAR SOLENOID VALVE IAW 323203 AND LEFT MAIN LANDING GEAR OUTBOARD DOOR SEQUENCE VALVE IAW 323204. LEAK CHECK GOOD, PN ON: 12032943001SN: 458 SN OFF: 1855PN ON: 18190003, SN: 175 SN OFF: 710.