Narrative:

At approximately XA00 we were issued a takeoff clearance from stl tower from runway 30L, to fly heading 340 degrees, climb and maintain 5000 ft. Shortly after takeoff at approximately 1500 ft AGL, we received a 'traffic, traffic' TA followed by a 'descend, descend, descend' RA. As the PF, I responded with a reversal from a 1500 FPM climb to a 2000 FPM descent to meet the RA response required. Seconds after, we received a GPWS 'terrain, terrain' warning, at which time I stopped the descent and started a climb with the terrain in sight. The captain advised ATC of the near midair collision and ATC issued a clearance to climb to 6000 ft right turn to 360 degrees. I did see the intruder aircraft after beginning the descent. ATC advised they would be looking into the incident. I believe the crew responded properly and that TCASII and GPWS worked well in increasing the level of safety. Callback conversation with reporter revealed the following information: the reporter states the intruding aircraft had departed a nearby airport and was attempting radio contact with the stl tower. It is unknown if the tower had radar contact with the intruding aircraft. According to reports given to one of the crew members, the intruding aircraft came within 810 ft horizontal and 400 ft vertical.

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Original NASA ASRS Text

Title: A FLC RECEIVED A TCASII RA ON DEP FROM STL.

Narrative: AT APPROX XA00 WE WERE ISSUED A TKOF CLRNC FROM STL TWR FROM RWY 30L, TO FLY HDG 340 DEGS, CLB AND MAINTAIN 5000 FT. SHORTLY AFTER TKOF AT APPROX 1500 FT AGL, WE RECEIVED A 'TFC, TFC' TA FOLLOWED BY A 'DSND, DSND, DSND' RA. AS THE PF, I RESPONDED WITH A REVERSAL FROM A 1500 FPM CLB TO A 2000 FPM DSCNT TO MEET THE RA RESPONSE REQUIRED. SECONDS AFTER, WE RECEIVED A GPWS 'TERRAIN, TERRAIN' WARNING, AT WHICH TIME I STOPPED THE DSCNT AND STARTED A CLB WITH THE TERRAIN IN SIGHT. THE CAPT ADVISED ATC OF THE NMAC AND ATC ISSUED A CLRNC TO CLB TO 6000 FT R TURN TO 360 DEGS. I DID SEE THE INTRUDER ACFT AFTER BEGINNING THE DSCNT. ATC ADVISED THEY WOULD BE LOOKING INTO THE INCIDENT. I BELIEVE THE CREW RESPONDED PROPERLY AND THAT TCASII AND GPWS WORKED WELL IN INCREASING THE LEVEL OF SAFETY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATES THE INTRUDING ACFT HAD DEPARTED A NEARBY ARPT AND WAS ATTEMPTING RADIO CONTACT WITH THE STL TWR. IT IS UNKNOWN IF THE TWR HAD RADAR CONTACT WITH THE INTRUDING ACFT. ACCORDING TO RPTS GIVEN TO ONE OF THE CREW MEMBERS, THE INTRUDING ACFT CAME WITHIN 810 FT HORIZ AND 400 FT VERT.

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.