Narrative:

We have parallel runways. Air carriers have to cross our small runway to get to our large runway. Ground control keeps them on taxiway a parallel to the runways and switches them to local 1. Local 1 then gets approval from local 2 to cross when needed. I was training a developmental on local 2. Local 1 gave us a pilatus on a 5 mile final. We cleared him to land. Local 1 asked if he could cross runway 19L after the pilatus. My trainee approved it. It is common practice to start a turn with an air carrier but hold him short of the left; so that right when the airplane touches down you can finish the crossing and the plane crossing never stops. We do that all day long. I saw air carrier X turning as they always do; but then I saw him continue onto the runway. I looked for the pilatus but there was our tower beam in the way so without seeing him I immediately scrambled and sent the pilatus around repeatedly because I never saw him cross the threshold. Our runway is so short that the pilatus has to come in low. After I told him to go around we saw him barley climbing over air carrier X and it was extremely close. Technically speaking he was 'sent around' prior to the threshold so it was not considered a loss of separation in that way; however the pilatus came extremely close and flew right over air carrier X. I think a major contributor is that we close runway 19L for taxiing at xc:30 pm local (due to construction). Air carriers are used to the runway being closed. In the summer it is still light at xc:30. So by the time it is dark the left runway is always closed. When this occurred it was not even xa:00 yet and it was dark. I believe air carrier X thought it was closed because it was dark and habitually crossed the runway. If a pilot comes in every single night and when it's dark it is always closed; it wouldn't be unreasonable to think it was closed. Even though it is the pilots responsibility to listen to the ATIS and listen to his instructions; he also goes by instinct. Something needs to happen to break pilots out of this. Our ATIS is so long that pilots complain about it regularly. We put everything on the ATIS at our facility. I don't think it is too far off to say that a pilot would skim through the ATIS because there is so much 'junk' on it. Things that are important need to be on the ATIS.

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Original NASA ASRS Text

Title: SNA Controller providing OJT issued last minute go-around to traffic on short final for Runway 19L when an air carrier taxing for departure entered landing runway; reporter summarized a number of possible casual factors.

Narrative: We have parallel runways. Air Carriers have to cross our small runway to get to our large runway. Ground Control keeps them on Taxiway A parallel to the runways and switches them to Local 1. Local 1 then gets approval from Local 2 to cross when needed. I was training a Developmental on Local 2. Local 1 gave us a Pilatus on a 5 mile final. We cleared him to land. Local 1 asked if he could cross Runway 19L after the Pilatus. My trainee approved it. It is common practice to start a turn with an air carrier but hold him short of the left; so that right when the airplane touches down you can finish the crossing and the plane crossing never stops. We do that all day long. I saw Air Carrier X turning as they always do; but then I saw him continue onto the runway. I looked for the Pilatus but there was our tower beam in the way so without seeing him I immediately scrambled and sent the Pilatus around repeatedly because I never saw him cross the threshold. Our runway is so short that the Pilatus has to come in low. After I told him to go around we saw him barley climbing over Air Carrier X and it was extremely close. Technically speaking he was 'sent around' prior to the threshold so it was not considered a loss of separation in that way; however the Pilatus came EXTREMELY close and flew right over Air Carrier X. I think a major contributor is that we close Runway 19L for taxiing at XC:30 PM local (due to construction). Air Carriers are used to the runway being closed. In the summer it is still light at XC:30. So by the time it is dark the left runway is always closed. When this occurred it was not even XA:00 yet and it was dark. I believe Air Carrier X thought it was closed because it was dark and habitually crossed the runway. If a pilot comes in every single night and when it's dark it is always closed; it wouldn't be unreasonable to think it was closed. Even though it is the pilots responsibility to listen to the ATIS and listen to his instructions; he also goes by instinct. Something needs to happen to break pilots out of this. Our ATIS is so long that pilots complain about it regularly. We put everything on the ATIS at our facility. I don't think it is too far off to say that a pilot would skim through the ATIS because there is so much 'junk' on it. Things that are important need to be on the ATIS.

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.