What was found
RT MAIN LANDING GEAR FAILED TO EXTEND. INVESTIGATION FOUND THE RT MAIN LANDING GEAR DOWNLOCK WAS STUCK DUE TO CARBON BUILDUP FROM EXHAUST AND ALSO LUBRICATION DRYING OUT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RT MAIN LANDING GEAR FAILED TO EXTEND. INVESTIGATION FOUND THE RT MAIN LANDING GEAR DOWNLOCK WAS STUCK DUE TO CARBON BUILDUP FROM EXHAUST AND ALSO LUBRICATION DRYING OUT.