As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) EXCESSIVE EXHAUST BACK PRESSURE - MUFFLER 2 INCH STACK HOLE IN CAN 1.5 INCH DIAMETER LEFT A HIGH RESTRICTION CAUSING HIGH HEAT PROGRESSIVELY COLLAPSING THE PERFORATED BAFFLE AROUND THE EMERGECY BAIL RESULTING IN A SERIOUS LOSS OF POWER.