As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLOW DIVIDER IN THE WYE EXHAUST PIPE GOING TO THE TURBO SUPER CHARGER BROKE CAUSING A PIECE OF METAL APPROXIMATELY 1.50 INCHES BY 2.50 INCHES LONG TO ENTER THE EXHAUST HOUSING SIDE OF THE TURBO. THIS LIMITED THE TURBOCHARGER MAX OUTPUT TO 5,000 FEET MSL. NO INTERNAL DAMAGE OF TURBOCHARGER TURBINE. SUBMITTER STATED SHOULD INSPECT INSIDE OF WYE PIPE IF MAXIMUM BOOST CANNOT BE ATTAINED.