As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE. WHEN CLOSING FIRST OFFICER`S SLIDING WINDOW, A LOUD POP AND INCREASED FORCE REQUIRED WHERE WINDOW ARM TURNS 90 DEGREES. CLEANED FIRST OFFICER`S R2 WINDOW TRACK AND SEALS. LUBED WINDOW TRACK AND SEALS, PER AMM 56-11-13. OPERATIONAL CHECKED GOOD.