As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING THE TAKEOFF ROLL WE NOTICED AN ABNORMAL AND INCREDIBLY LOUD RUSHING AND WHOOSHING SOUND OF AIR SEEMINGLY FROM THE FIRST OFFICER WINDOW AND SIDE PANEL. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT LAX. FOUND SLIDING WINDOW HANDLE MECHANISMOUT OF ADJUSTMENT ALONG WITH ROPE SEAL AT UPPER RIGHT HAND CORNER OF R1 WINDOW SEPARATED. REMOVE AND REPLACED FIRST OFFICER SLIDING WINDOW. PER JOB CARD 08L21056002. OPERTIONAL CHECK GOO0D AT THIS TIME.