As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 5 EXHAUST HEADER CRACKED AT CYLINDER JUST BELOW FLANGE ONE HALF THE WAY AROUND HEADER UNDER NORMAL USE. HEADER NEEDS REDESIGN OR SOME SORT OF SUPPORT. IT IS OVER CANTILEVERED FOR STRESSES IMPOSED ON IT. NR 6 HEADER CRACKED THRU THE FLANGE FOR A DISTANCE OF ABOUT 1.5 INCHES RADIUSING OUT ALONG THE FLANGE WELD. AIRFRAME AND EXHAUST HOURS: 25.6 (K)