As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT 1484 - THE FLIGHT WAS AIRBORNE FOR JUST A FEW MINUTES WHEN THE FIRST OFFICERS WINDOW LATCHED INTO THE OPEN POSITION AND COULD NOT BE CLOSED. THE FLIGHT RETURNED TO PHL WHERE LANDING WAS WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE WINDOW FRAME COMPOUND WAS NOT SMOOTH AND THE LOCK HANDLE OUT OF ADJUSTMENT. SMOOTHED COMPOUND AND ADJUSTED LOCK. (M)