What was found
(AUS) COPILOTS SLIDING WINDOW SEPARATED AND CONTACTED TAIL ROTOR. WINDOW HAD BEEN ACCIDENTALLY CONTACTED BY PASSENGER. CAUSED BYCHANNEL SURROUND DISBONDING AFTER ACCIDENTAL CONTACT. EXAMINATION OF THE CHANNEL SURROUND REVEALED APPROXIMATELY 33 PERCENT OF TOTAL LENGTH (50 PERCENT OF TOP AND BOTTOM SIDES) DISBONDED FROM MAIN WINDOW. THE CHANNEL MATERIAL APPEARED STIFF AND HAD A POWDERY EXTERIOR SURFACE.