As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TOWER REPORTS UNIT INTERMITTENT. REPLACED INOPERATIVE CR202 MIXER DIODE. ALSO REPLACED FACEPLATE ASSEMBLY DUE TO BROKEN KNOB. REPLACED DETERIORATED R477 RESISTOR. REPLACED WEAK V301 PHOTODETECTOR. ADJUSTED FREQUENCY AND PULSE AND ADJUSTED FOR BEST SLS LEVEL. UNIT BENCH CHECKGOOD.