As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT MODIFIED PER STC SA4943SW (RAM WINGLETS AND GROSS WEIGHT INCREASE) AND STC SA7633SW (LIQUID ENGINES AND MCCAULEY PROPS). SPINNER BULKHEAD FOUND WITH 3 CRACKS EMANATING FROM ATTACHMENT STUD HOLES. TWO CRACKS APPROXIMATELY 1 INCH LONG, OTHER APPROXIMATELY 4 INCHES LONG. IT APPEARS THE WAY THE 3 CRACKS STARTED, THAT THE OTHER 3 MOUNT HOLES WOULD CRACK SOON. POSSIBLE REINFORCEMENT REQUIRED IN THIS AREA.