As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON OPENING THE L1 DOOR, TOP GUST LOCK BRACKET BOLT SEVERED AT THE EYE BOLT. THE DOOR WAS HALFWAY THROUGH ROTATION WHEN A POP WAS HEARD. VERIFIED THE L1 DOOR CLOSED AND LOCKED. THE AIRCRAFT WAS GROUNDED. REPLACED THE ROD END AND ADJUSTED THE NUT ON THE L1 DOOR GUIDE ARM IAW MM 52-11-21. ADJUSTED GUIDE ARM IAW MM 52-11-00. OPS CHECKED GOOD.