As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON GEAR RETRACTION LEFT MAIN GEAR DID NOT COME UP. RED A/B LIGHTS WITH RED B-LIGHT. CYCLED GEAR 3 TIMES. EACH TIME GEAR UP LIGHT INDICATION DID NOT CHANGE. RETURNED AND LANDED. ADJUSTED LT MLG O/B SEQUENCE VALVE CONTROL STOP. OPS CHECK GOOD.