Narrative:

We broke out about 600 AGL and both the first officer and I noticed an aircraft was in position holding but we had been cleared to land. The first officer queried tower if an airplane was holding on the runway. The aircraft on the runway answered in the affirmative and we initiated a go-around from below 500 ft as tower issued us go-around instructions. We executed the go-around and came back around the pattern and landed safely. Had visibility been more restricted; this could have been disastrous.

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Original NASA ASRS Text

Title: A serious ground conflict occurred when an MD80 flight crew understanding they were cleared only to LUAW on the active runway; remained on the runway when an A330 broke out of the overcast on final about 500 AGL. An aircraft holding short noted the conflict and alerted the conflicted aircraft and ATC. The landing aircraft executed a go-around. ATC believed the LUAW aircraft had been cleared for takeoff.

Narrative: We broke out about 600 AGL and both the First Officer and I noticed an aircraft was in position holding but we had been cleared to land. The First Officer queried Tower if an airplane was holding on the runway. The aircraft on the runway answered in the affirmative and we initiated a go-around from below 500 FT as Tower issued us go-around instructions. We executed the go-around and came back around the pattern and landed safely. Had visibility been more restricted; this could have been disastrous.

Data retrieved from NASA's ASRS site 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.