As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AT TOP OF CLIMB, A LENGTH OF WINDOW SEALANT FROM THE R1 WINDOW BECAME DISLODGED AND BEGAN SLAPPING THE GLASS. CREW ELECTED TO RETURN, WHERE THE WINDOW WAS INSPECTED AND LOOSE SEALANT REMOVED. A/C RETURNED TO SERVICE AND WINDOW WAS RESEALED AT THE NEXT MAINTENANCE FACILITY.