As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION FOR SQUEALING IN THE HEADSETS. PERFORMED EXTERNAL LEAK CHECK OF FLIGHT DECK WINDOWS PER AMM 055191. LOUD SQUEAL FROM F\O NR 2 WINDOW FWD EDGE NOTED FROM INSIDE ONLY AND VERY LOUD. REMOVED OBSTRUCTION FROM WINDOW FWD EDGE SEAL. REPEATED TEST IAW AMM 05 5191. NO SQUEALS OR EXCESSIVE LEAKS NOTED.