As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING SCHEDULED MAINTENANCE, REMOVED RT EXHAUST STACKS TO FACILITATE INSPECTING THE EXHAUST DUCT. FOUND A 1 INCH CRACK IN THE SKI SLOPE. SB 3380 WAS COMPLIED WITH 711 HOURS EARLIER. POWER SECTION WAS PULLED AND SENT OFF FOR REPAIR.