As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERMITTENT MODE "C" OPERATION. CLEANED CORROSION FROM UNIT. FOUND WEAK MTL AND TRANSMIT POWER. TROUBLESHOT AND REPLACED V201 CAVITY OSCILLATOR AND CATHODE ASSY, ADJUSTED FREQUENCY AND POWER TO SPECS. ALSO FOUND DYNAMIC RANGE OUT OF SPECS. ALIGNED AND ADJUSTED RECEIVER AND VIDEO BOARD SEVERAL TIMES. BENCH CHECK GOOD.