As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 HF RADIO TUNING TONE INITIATES AT RANDOM TIMES MAKING RADIO UNUSABLE FOR COMMUNICATION. GROUNDED-YES. REMOVED AND REPLACED HF TRANSCEIVER, IAW B737-800 AMM 23-11-210. OPERATIONS CHECK NORMAL, OK FOR SERVICE. NOTIFIED SEAMC LESTER.