As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON WALK AROUND FOUND RIGHT PACK EXHAUST PLENUM DEFUSER DAMAGED. MOUNT BRACKETS APPEAR TO BE BROKEN. REMOVED R/H PRIMARY AND SECONDARY HEAT EXCHANGERS PER MM 21-51-03 REPLACED RT PACK EXHAUST PLNUM DIFFUSER, REF L/ P 4286420. REINSTALLED PRIMARY AND SECONDARY HEAT EXCHANGERS. RIGHT PACK SYSTEM OP AND LEAK CHECKS GOOD.