Narrative:

We (aircraft X) were on a visual approach to runway 17 myr. We were approximately 3 mi out and cleared to land when we received a TCASII aural traffic alert, followed by a monitor vertical speed command. I observed a target (aircraft Y) on TCASII at 11 O'clock position, 1 mi and lower than our aircraft. I then sighted the aircraft visually. We had already begun a leveloff when we received an RA climb command. I was the PF and immediately executed a missed approach. The first officer (PNF) asked ATC what's going on. The tower controller then asked if we were going around. We confirmed the go around and were resequenced into the traffic pattern for a normal visual approach and landing. When we first turned final on the first approach, I recall the tower controller instruct a VFR C172 to follow us visually and indicated he was #2. I called the tower when we arrived at the gate and the tower controller indicated that the cessna had us visually and indicated he would follow us. I think that the tower controller was working several aircraft in the pattern that were doing touch and goes. During our turn to final, I observed 2 targets that appeared to be on left downwind for runway 17. One aircraft had made a statement to the tower controller, that he was going to remain close to the airport until he was sure his engine was going to run smoothly. I don't know if this could have anything to do with the cessna turning in early. I think the controller did what was required to ensure separation had the cessna complied with the instructions. This sequence of events happened very quickly. I am thankful for TCASII.

Related reports:

Google
 

Original NASA ASRS Text

Title: ACR CL65 FLC EXECUTES A GAR WHEN TCASII RA OBSERVED C172 CUTS IN FRONT OF HIM ON SHORT FINAL TO MYR.

Narrative: WE (ACFT X) WERE ON A VISUAL APCH TO RWY 17 MYR. WE WERE APPROX 3 MI OUT AND CLRED TO LAND WHEN WE RECEIVED A TCASII AURAL TFC ALERT, FOLLOWED BY A MONITOR VERT SPD COMMAND. I OBSERVED A TARGET (ACFT Y) ON TCASII AT 11 O'CLOCK POS, 1 MI AND LOWER THAN OUR ACFT. I THEN SIGHTED THE ACFT VISUALLY. WE HAD ALREADY BEGUN A LEVELOFF WHEN WE RECEIVED AN RA CLB COMMAND. I WAS THE PF AND IMMEDIATELY EXECUTED A MISSED APCH. THE FO (PNF) ASKED ATC WHAT'S GOING ON. THE TWR CTLR THEN ASKED IF WE WERE GOING AROUND. WE CONFIRMED THE GAR AND WERE RESEQUENCED INTO THE TFC PATTERN FOR A NORMAL VISUAL APCH AND LNDG. WHEN WE FIRST TURNED FINAL ON THE FIRST APCH, I RECALL THE TWR CTLR INSTRUCT A VFR C172 TO FOLLOW US VISUALLY AND INDICATED HE WAS #2. I CALLED THE TWR WHEN WE ARRIVED AT THE GATE AND THE TWR CTLR INDICATED THAT THE CESSNA HAD US VISUALLY AND INDICATED HE WOULD FOLLOW US. I THINK THAT THE TWR CTLR WAS WORKING SEVERAL ACFT IN THE PATTERN THAT WERE DOING TOUCH AND GOES. DURING OUR TURN TO FINAL, I OBSERVED 2 TARGETS THAT APPEARED TO BE ON L DOWNWIND FOR RWY 17. ONE ACFT HAD MADE A STATEMENT TO THE TWR CTLR, THAT HE WAS GOING TO REMAIN CLOSE TO THE ARPT UNTIL HE WAS SURE HIS ENG WAS GOING TO RUN SMOOTHLY. I DON'T KNOW IF THIS COULD HAVE ANYTHING TO DO WITH THE CESSNA TURNING IN EARLY. I THINK THE CTLR DID WHAT WAS REQUIRED TO ENSURE SEPARATION HAD THE CESSNA COMPLIED WITH THE INSTRUCTIONS. THIS SEQUENCE OF EVENTS HAPPENED VERY QUICKLY. I AM THANKFUL FOR TCASII.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.