As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE BASE MAINTENANCE TEAM FOUND THE HF RADIO SYSTEM INOP DURING MAINTENANCE CHECKS. THE MAINTENANCE FOR THE HF RADIO WAS DEFERRED DUE TO PARTS AVAILABILITY. THE AIRCRAFT WAS RETURNED TO SERVICE. DURING THE MAINTENANCE EVENT THE DEFECTIVE ANTENNA COUPLER WAS REMOVED AND AN OVERHAULED ANTENNA COUPLER WAS INSTALLED. OPERATIONAL CHECKS WERE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.