As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TOP BROKEN. REPLACED BROKEN SWITCH BOARD ASSY AND BROKEN FACEPLATE. INSTALLED MISSING IDENT PUSH BUTTON. UNIT HAD WEAK POWER OUT. REPLACED CAVITY TUBE V101. REPAIRED. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. FOUND UNIT TO HAVE WEAK RECEIVE. ALIGNED RECEIVER. REPAIRED AND BENCH CHECK GOOD.