What was found
REF AIRCOMM STC SR00601DE. INSPECTION FOUND TAIL ROTOR DRIVESHAFT (PN: B651M1001101) SCORED FROM CONTACT WITH THE CONDENSER DUCT INSTALLATION ROUTED OVER THE TAIL ROTOR DRIVESHAFT. DAMAGE TO THE SHAFT FROM SCORING REQUIRES REPLACEMENT OF THE SHAFT. DAMAGE COULD RESULT IN INFLIGHT FAILURE AND LOSS OF CONTROL OF THE TAIL ROTOR SYSTEM. DUCT ROUTED AND CLAMPED IAW DRAWING NO. EC145-705 REV: A AND ADDITIONAL CLAMP INSTALLED AS MINOR DEVIATION TO THE STC AND IAW AC43.13.