As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NEEDS BENCH CHECK. INSPECTED. INSTALLED HEATSINK BEHIND TRANSISTOR Q415 AS PER KING SERVICE BULLETIN KT76-A-6. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. UNIT HAS WEAK POWER OUT AND UNABLE TO ADJUST FREQUENCY TO SPECS. REPLACED CAVITY TUBE V101. REPAIRED.CLEANED CONTACTS ON WAFER SWITCHES. ADJUSTED PULSE WIDTH AND FREQUENCY. BENCH CHECK GOOD.