Narrative:

First sna tower does a great job with all aircraft from J3 to commercial fixed wing aircraft and keeping everyone apart. We were cleared visual to runway 19R. Tower was also working a mooney and had them cross mid field over the runway to go to runway 19L -- I looked inside the aircraft to make sure we had completed the checklist. At 500 ft both first officer and I saw a cessna 172 abeam us he overshot runway 19L; the GA runway. We over took the C172 at a rapid pace. He made a turn back to runway 19L. Tower never called the traffic out to us. The TCAS alerted but we thought it was the mooney going over the top of the airport. Both aircraft had a loss of separation. We called sna tower after landing they said they were in a briefing and forgot to call the traffic out landing on runway 19L. Sna is a handful to fly into short runway and lots of mixed traffic. Controllers need to give both GA and airlines traffic a heads up. They do a great job on a daily basis.

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Original NASA ASRS Text

Title: An air carrier crew on short final has a near miss with a VFR Cessna at about 400 FT on short final to SNA 19L with traffic not reported to them. The Controller responsible for tracking traffic conflicts was briefing.

Narrative: First SNA Tower does a great job with all aircraft from J3 to commercial fixed wing aircraft and keeping everyone apart. We were cleared Visual to Runway 19R. Tower was also working a Mooney and had them cross mid field over the runway to go to Runway 19L -- I looked inside the aircraft to make sure we had completed the checklist. At 500 FT both First Officer and I saw a Cessna 172 abeam us he overshot Runway 19L; the GA runway. We over took the C172 at a rapid pace. He made a turn back to Runway 19L. Tower never called the traffic out to us. The TCAS alerted but we thought it was the Mooney going over the top of the airport. Both aircraft had a loss of separation. We called SNA Tower after landing they said they were in a briefing and forgot to call the traffic out landing on Runway 19L. SNA is a handful to fly into short runway and lots of mixed traffic. Controllers need to give both GA and airlines traffic a heads up. They do a great job on a daily basis.

Data retrieved from NASA's ASRS site as of April 2012 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.