Overview

• The NTSB found the local controller used poor judgment by prioritizing an unrelated call about another flight’s altitude as the Citation approached.
• The tower operations supervisor was occupied with troubleshooting a jammed flight‑strip printer instead of switching to a backup, reducing oversight.
• Southwest Airlines Flight 2493 was holding on Runway 27 when a Cessna Citation was cleared to land on the same runway, bringing the aircraft within about 100 feet.
• San Diego’s ASDE‑X surface‑radar system issued visual and aural conflict alerts, and the Citation executed a go‑around; no injuries or damage occurred.
• The findings reinforce scrutiny of staffing, training, and surface‑detection coverage at U.S. airports, with San Diego among 35 equipped with ASDE‑X.