As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REMOVED FUEL FLOW TRANSDUCER, INSTALLED UNDER STC NR SA809GL. UNIT PROVIDING ERRONEOUS FUEL FLOW READINGS AND CAUSING THE AIR DATA COMPUTER (ADC) ALSO INSTALLED INT THE AIRCRAFT TO FUNCTION IMPROPERLY. AIR DATA COMPURTER (ADC) INSTALLED, EFIS-SV SYSTEM IAW STC NR SA02203AK.