As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE REPLACING DORSAL FIN PER SB 550-53-24, A 2" CRACK WAS FOUND IN THE R/H SKIN ABOUT HALF WAY BETWEEN THE FRESH AIR DUCT FLANGE AND THE FRAME AT FS456.50 TRAVELLING CIRCUMFERENTIALLY FROM THE TOP EDGE TOWARDS THE R/H SIDE. AREA IS BEING REPAIRED BY INSERTING A PATCH AND OVERLYING A DOUBLER. ASSB 856-0047 REPAIR TO FUSELAGE SKIN UNDER DORSAL FIN AT FS 456.50.