As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNING SMELL DETECTED ON CLIMB OUT PORTION OF FLIGHT. USED BORESCOPE AND CHECKED DOWN RAM AIR SCOOP. FOUND BUGS ON TOP OF AIR CYCLE MACHINE COOLER INTAKE. REMOVED LOWER RAM AIR DUCT AT ACM AND CLEANED OUT BUGS. INSTALLED LOWER RAM AIR DUCT. STARTED ENGINES AND RAN ACM—NO SMELLS NOTED. WORK COMPLETED IAW AMM 12-53.