As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FIRST OFFICERS SLIDING WINDOW RELEASE HANDLE MALFUNCTIONING - HANDLE RAISES AND PREVENTS WINDOW FROM OPENING PROPERLY-UNSAFE FOR EMERGENCY EGRESS. MAINTENANCE CLEANED THE INTERFACE BETWEEN THE SLIDING WINDOW SLEEVE AND ARM ASSEMBLY, APPLIED THREAD LOCKING ADHESIVE PER CMM 56-12-12. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.