As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAINTENANCE MANUAL FOR BO-105 CALLS FOR TRANSMISSION FILTER BOLT, PN 2101005241, TO BE SAFETY WIRED, BUT THE BOLT HAS NO HOLE DRILLED. AT FURTHER CHECK OF 105 FLEET, REVEALS NONE OF THE BOLTS ARE DRILLED. DRILLED BOLT AND SAFETIED. EITHER MM SHOULD BE CHANGED OR BOLT SHOULD BE DRILLED FROM NEW.