As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON TAKE OFF ROLL, CLIMB, CRUISE, AND DESCENT, LOUD AIR NOISE COMING FROM LEFT SIDE OF COCKPIT. PRESSURIZATION WAS NORMAL. SUSPECT L2 WINDOW. REMOVED AND REPLACED CAPTAINS SLIDING WINDOW PER AMM 56-12-11. LEAK CHECK GOOD PER AMM 05-51-91. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.