As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT MAIN LANDING GEAR WOULD NOT RETRACT. RED A & B LIGHTS REMAINED ILLUMINATED. CYCLED THE GEAR MULTIPLE TIMES. LIGHT REMAINED ILLUMINATED. GEAR DID NOT RETRACT. RETURNED TO FIELD. ADJUSTED RT MAIN GEAR DOOR SEQUENCE VALVE. EXTENDED AND RETRACTED GEAR SEVERAL TIMES. OPS CHECK GOOD.