Narrative:

During final phase of an ILS approach to gso runway 23, we switched to tower at brant LOM and received landing clearance. At 600' on the radio altimeter, we exited the clouds and saw the approach lights through the rain/fog. Due to the poor visibility, actual sighting of the runway lights did not occur for another few seconds. As I began to fully transition to a visibility approach and reduce power to land, the captain noticed strobe lights about 4000' down the runway and directed a go around. As I executed the missed approach, I commenced a left turn to avoid light aircraft Y that was commencing an intersection takeoff from runway 23 (probably at taxiway left). Tower never advised us that another aircraft Y was on the runway. Both the captain and I believe that we would not have seen the aircraft Y west/O strobe lights. We never got a satisfactory explanation from the tower about why we were never advised of the other aircraft Y or how long he had been on the runway. Traffic at the time seemed to be light. Had we not executed the missed approach and made an evasive turn, there is a high probability we would have hit the other aircraft.

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Original NASA ASRS Text

Title: ACR MLG INITIATES A GO AROUND BREAKING OUT OF CLOUDS AT GSO UPON SIGHTING A LIGHT ACFT TAKING OFF DOWNFIELD.

Narrative: DURING FINAL PHASE OF AN ILS APCH TO GSO RWY 23, WE SWITCHED TO TWR AT BRANT LOM AND RECEIVED LNDG CLRNC. AT 600' ON THE RADIO ALTIMETER, WE EXITED THE CLOUDS AND SAW THE APCH LIGHTS THROUGH THE RAIN/FOG. DUE TO THE POOR VISIBILITY, ACTUAL SIGHTING OF THE RWY LIGHTS DID NOT OCCUR FOR ANOTHER FEW SECS. AS I BEGAN TO FULLY TRANSITION TO A VIS APCH AND REDUCE PWR TO LAND, THE CAPT NOTICED STROBE LIGHTS ABOUT 4000' DOWN THE RWY AND DIRECTED A GAR. AS I EXECUTED THE MISSED APCH, I COMMENCED A LEFT TURN TO AVOID LIGHT ACFT Y THAT WAS COMMENCING AN INTXN TKOF FROM RWY 23 (PROBABLY AT TXWY L). TWR NEVER ADVISED US THAT ANOTHER ACFT Y WAS ON THE RWY. BOTH THE CAPT AND I BELIEVE THAT WE WOULD NOT HAVE SEEN THE ACFT Y W/O STROBE LIGHTS. WE NEVER GOT A SATISFACTORY EXPLANATION FROM THE TWR ABOUT WHY WE WERE NEVER ADVISED OF THE OTHER ACFT Y OR HOW LONG HE HAD BEEN ON THE RWY. TFC AT THE TIME SEEMED TO BE LIGHT. HAD WE NOT EXECUTED THE MISSED APCH AND MADE AN EVASIVE TURN, THERE IS A HIGH PROBABILITY WE WOULD HAVE HIT THE OTHER ACFT.

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.