As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RAPID DECOMPRESSION AT FL390. VERIFIED ALL DOORS CLOSED AND LATCHED, INSPECTED A/C AND FOUND SAFE FOR 1 TIME FERRY FLIGHT. ON INSPECTION OF PRESSUIZATION FOUND NR 1 SAFETY VALVE FLAGGED. R & R NR 1 SAFETY VALVE IAW AMM 21-32-03. OPS CHECKED GOOD AT THIS TIME.