As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WILL NOT RETRACT, WITH LANDING GEAR LEVER DISAGREE MESSAGE ON TAKEOFF. REMOVED AND REPLACED LH CONTROL LEVEL. OPS CHECK SAT. PERFORMED MLG EXTENSION AND RETRACTION OPS CHECK. OPS CHECK SAT. CLEANED LG WOW PROX SWITCHES. OPS CHECK SAT.