As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPEARS INOPERATIVE AND LIGHT DOES NOT COME ON DURING TEST. REPLACED PHOTOCELL V301. REPAIRED. REPLACED CRACKED FACEPLATE ASSY. REPLACED CAVITY TUBE V101 DUE TO LOW POWER OUT. INSTALLED HEATSINK BEHIND TRANSISTOR Q415 AND REPLACED DETERIORATED RESISTOR R477. ADJUSTED FREQUENCY, PULSE WIDTH AND ALIGNEDRECEIVER TO SPECS. CLEANED CONTACTS ON ALL WAFERS. BENCH CHECK GOOD.