As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ISSUE: LANDING GEAR LEVER DISAGREE MESSAGE AFTER TAKEOFF AND LANDING GEAR WOULDN'T RETRACT. EMERGENCY DECLARED BY BUR TOWER AIRCRAFT RETURNED TO BURBANK WITHOUT FURTHER INCIDENT. CORR ACTION: FERRIED TO LAS; LAS MX TEAM DUPLICATED DISCREPANCY AFTER JACKING/SWINGING GEAR. REPLACED LDG GEAR HANDLE, ALL OP CHECKS GOOD.