As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD HISSING NOISE COMING FROM F/O WINDOW. RTFL. *S/D* CREW COMMENT: TUBE WAS STUCK IN SLIDING WINDOW. AFTER LANDING, CREW OPENED WINDOW & RECONNECTED. INSPECTED TUBE, AND FOUND NO ABNORMALITIES. RECONNECTED DRAIN TUBE. OKAY FOR SERVICE.