What was found
RETURN TO DFW DUE TO COCKPIT WINDSCREEN DRAIN LINE CAUGHT IN F/O SLIDING WINDOW. EXTREMELY LOUD COCKPIT NOISE ABOVE 18K FT. REPOSITIONED SAME.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RETURN TO DFW DUE TO COCKPIT WINDSCREEN DRAIN LINE CAUGHT IN F/O SLIDING WINDOW. EXTREMELY LOUD COCKPIT NOISE ABOVE 18K FT. REPOSITIONED SAME.