As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) INTERGRANULAR CORROSION FOUND ON THE TOP LEFT AND RIGHT SIDES OF THE STIFFENER. ONE SIDE HAD CRACKS FROM THE EXPANSION OF THE MATERIAL. THIS APPEARS TO BE EXTREMELY FAST ACTING AS NO PROBLEM HAD BEEN NOTED 3 MONTHS PRIOR. OTHER CORROSION ALSO FOUND ON LEFT DOOR FRAME.