As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 716 FROM TOL TO ATL. AFTER TAKE OFF AND ON CLIMB OUT, WHEN GEAR HANDLE PLACED IN THE UP POSITION, THE GEAR WARNING HORN SOUNDED. WITH GEAR RETRACTED, GEAR RED LIGHTS REMAINED ILLUMINATED. CYCLED GEAR NO EFFECT. SELECTED GEAR DOWN AND RETURNED TO TOL. AIRCRAFTLANDED WITHOUT FURTHER INCIDENT.FOUND LANDING GEAR ACCESSORY UNIT FAILED. REPLACED LANDING GEAR ACCESSORY UNIT. OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.