What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: while on a visual approach to runway 27R, pbi, the captain and f/o heard "usair, go around." The crew initiated a go around at 400 AGL. The crew assumed it was an instruction from pbi tower. In fact it was from an unknown source in the area. The tower personnel did not hear the transmission, and it was not on the tower tape. However, according to technicians at the pdi ATCT, it would be possible for the aircraft to receive the instruction, and the tower not to receive it. Depending on direction and location of the false transmitter. The crew reacted properly, since they were the only usair flight in the area. At 400 AGL there would be not enough time to query the tower. They did what they are trained to do, and made a visual go-around. Law enforcement came up empty handed. Unfortunately, the voice tape was not taken out by usair to preserve the recording. This would be an advisable action to take in future occurrences of this type.
As the FAA filed it
NARRATIVE: WHILE ON A VISUAL APPROACH TO RUNWAY 27R, PBI, THE CAPTAIN AND F/O HEARD "USAIR, GO AROUND." THE CREW INITIATED A GO AROUND AT 400 AGL. THE CREW ASSUMED IT WAS AN INSTRUCTION FROM PBI TOWER. IN FACT IT WAS FROM AN UNKNOWN SOURCE IN THE AREA. THE TOWER PERSONNEL DID NOT HEAR THE TRANSMISSION, AND IT WAS NOT ON THE TOWER TAPE. HOWEVER, ACCORDING TO TECHNICIANS AT THE PDI ATCT, IT WOULD BE POSSIBLE FOR THE AIRCRAFT TO RECEIVE THE INSTRUCTION, AND THE TOWER NOT TO RECEIVE IT. DEPENDING ON DIRECTION AND LOCATION OF THE FALSE TRANSMITTER. THE CREW REACTED PROPERLY, SINCE THEY WERE THE ONLY USAIR FLIGHT IN THE AREA. AT 400 AGL THERE WOULD BE NOT ENOUGH TIME TO QUERY THE TOWER. THEY DID WHAT THEY ARE TRAINED TO DO, AND MADE A VISUAL GO-AROUND. LAW ENFORCEMENT CAME UP EMPTY HANDED. UNFORTUNATELY, THE VOICE TAPE WAS NOT TAKEN OUT BY USAIR TO PRESERVE THE RECORDING. THIS WOULD BE AN ADVISABLE ACTION TO TAKE IN FUTURE OCCURRENCES OF THIS TYPE.