What was found
REPEAT WRITE UP - ON INITIAL RETRACTION, GEAR WOULD NOT COME UP, SEVERAL ATTEMPTS WITH NO SUCCESS. RED TAB CHECKLIST RAN, LANDING GEAR LEVER LATCH FAILED TO RELEASE RESULTING IN LATCH BEING RAISED, AND GEAR RETRACTED. FOUND LANDING GEAR CONTROL LEVER LOCK SOLENOID BAD. REMOVED AND REPLACED LOCK SOLENOID PER MM 32-31-16, CHECKS NORMAL. ALSO, RAN GEAR RETRACTION AND EXTENSION WHILE A/C ON JACKS, OPS GOOD.