As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE WELDING PROCEDURE USED IN THE PREVIOUS REPAIR IS QUESTIONABLE, THE WELD IS CRACKING AROUND THE PERIMETER OF THE REPAIR PATCH PLATE. THE WELDING WAS COMP. BY AN UNKNOWN REPAIR FACILITY. THE VENT TUBE IS PART OF THE ENGINE BLEED AIR SYSTEM.