As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR FAILED TO EXTEND ELECTRICALLY. MANUAL EXTENSION WAS ATTEMPTED WITH NO EXTENSION. AIRCRAFT LANDED WITH WHEELS UP. INVESTIGATION REVEALED DUKES ACTUATOR (PN 3214-00) PINION GEAR (ADDRESSED IN AD 75-23-04) WORN BEYOND LIMITS CAUSING PINION AND DRIVE GEAR TO SLIP UNDER LOAD RESULTING IN TOTAL ELECTRIC AND MANUAL BACKUP FAILURE. RECORDS INDICATE C/W AD 75-23-04, 33 HOURS PRIOR.