As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBERS ON TRANSPONDER DOES NOT MATCH WHAT TOWER SAYS. FOUND CODING SWITCHES DIRTY, POSSIBLE CAUSING INCORRECT CODING. CLEANED SWITCHES TO REPAIR. REPLACED WEAK V101 CAVITY OSCILLATOR AND DETERIORATED R477 RESISTOR. ADJUSTED AS NEEDED. BENCH CHECK GOOD.