What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Aircraft departed San Antonio international airport, San Antonio, TX (ksat) en-route to sugarland, TX (ksgr) via VFR. Pilot reported smoke in the cabin. Aircraft returned to ksat and landed. Next day FAA inspector observed aircraft with engine cowling open and discovered left engine exhaust manifold heat exchanger damaged and aft piece of manifold laying on lower shroud. Evidence of direct cylinder exhaust from left side of engine discolored the firewall and melted the surrounding scat tubing and various electrical components insulation. The exhaust manifold subject to 50-hour recurring airworthiness directive previously accomplished 52.4 hours ago. Maintenance records indicate AD was overflown by 2.4 hours. Provided information to NTSB inspector todd fox and he stated this is minor damage and will not receive NTSB number and to classify as incident. Firewall ndt testing confirmed no structural damage. Aircraft being sent to salvage.
As the FAA filed it
AIRCRAFT DEPARTED SAN ANTONIO INTERNATIONAL AIRPORT, SAN ANTONIO, TX (KSAT) EN-ROUTE TO SUGARLAND, TX (KSGR) VIA VFR. PILOT REPORTED SMOKE IN THE CABIN. AIRCRAFT RETURNED TO KSAT AND LANDED. NEXT DAY FAA INSPECTOR OBSERVED AIRCRAFT WITH ENGINE COWLING OPEN AND DISCOVERED LEFT ENGINE EXHAUST MANIFOLD HEAT EXCHANGER DAMAGED AND AFT PIECE OF MANIFOLD LAYING ON LOWER SHROUD. EVIDENCE OF DIRECT CYLINDER EXHAUST FROM LEFT SIDE OF ENGINE DISCOLORED THE FIREWALL AND MELTED THE SURROUNDING SCAT TUBING AND VARIOUS ELECTRICAL COMPONENTS INSULATION. THE EXHAUST MANIFOLD SUBJECT TO 50-HOUR RECURRING AIRWORTHINESS DIRECTIVE PREVIOUSLY ACCOMPLISHED 52.4 HOURS AGO. MAINTENANCE RECORDS INDICATE AD WAS OVERFLOWN BY 2.4 HOURS. PROVIDED INFORMATION TO NTSB INSPECTOR TODD FOX AND HE STATED THIS IS MINOR DAMAGE AND WILL NOT RECEIVE NTSB NUMBER AND TO CLASSIFY AS INCIDENT. FIREWALL NDT TESTING CONFIRMED NO STRUCTURAL DAMAGE. AIRCRAFT BEING SENT TO SALVAGE.