As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRST WINDOW PLUG ON LEFT SIDE AFT OF MAIN CARGO DOOR BLEW OUT AND DEPARTED AIRCRAFT IN FLIGHT AT APPROXIMATELY FL250. SEE KCII M-7 PAGES 1-3 FOR WORK PERFORMED REPLACED WINDOW PLUG IAW B737-800 AMM 56-21-11, CABIN PRESSURE CHECK GOOD IAW 56-21-11, LEAK CHECK GOOD.