As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GUARD LIGHT STAYS ON, CAN'T TRANSMIT OR RECEIVE ON GUARD FREQUENCY WHEN CONTROL UNIT SWITCHED ON CHANNEL 2-15. VERIFIED GUARD RECEIVER VERY INTERMITTENT. TROUBLESHOT AND REPAIRED COLD SOLDIER JOINT ON J11 OF GUARD RECEIVER BOARD. ADJUSTED FREQUENCY AND MIC GAIN. UNIT BENCH CHECK GOOD.