Narrative:

We were cleared to land on runway 18L while on a 4 mi final. We did not know a light aircraft was holding in position on the same runway. At 2-3 mi out the aircraft was cleared for takeoff by the tower. The light aircraft was still on the runway when we reached 500 ft AGL. I instructed the first officer to execute a missed approach so there would be no conflict. The tower and I blocked each other out on the radio, when I told them we were going around. This was transmitted by an unknown third party.

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Original NASA ASRS Text

Title: WDB CAPT ELECTS TO GAR WHEN AN ACFT CLRED FOR TKOF IS STILL ON THE RWY.

Narrative: WE WERE CLRED TO LAND ON RWY 18L WHILE ON A 4 MI FINAL. WE DID NOT KNOW A LIGHT ACFT WAS HOLDING IN POS ON THE SAME RWY. AT 2-3 MI OUT THE ACFT WAS CLRED FOR TKOF BY THE TWR. THE LIGHT ACFT WAS STILL ON THE RWY WHEN WE REACHED 500 FT AGL. I INSTRUCTED THE FO TO EXECUTE A MISSED APCH SO THERE WOULD BE NO CONFLICT. THE TWR AND I BLOCKED EACH OTHER OUT ON THE RADIO, WHEN I TOLD THEM WE WERE GOING AROUND. THIS WAS XMITTED BY AN UNKNOWN THIRD PARTY.

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.