Narrative:

On jul/thu/93, we received our clearance on the ground at shd from ZDC 135.40. We were released by center. We announced takeoff on runway 23 with a left downwind departure to the northeast. This was transmitted on unicom. No other aircraft responded. On climb out approximately 2500 ft we contacted center. We were told 'radar contact.' we then transmitted again on unicom our position. No other aircraft response. At approximately 4500-5000 ft (we were cleared to 6000 ft) out of nowhere came a single engine aircraft at 12 O'clock. The first officer (PF) immediately pitched the aircraft over. The small aircraft went over us. This was very close. There is no doubt in my mind that if we had not pitched down, we would have collided. The distance was about 30 ft or less. I asked center if they had the single engine land small aircraft on radar. He said no. I then said we had had a near miss. He sternly replied he had no traffic. I then heard the small aircraft on unicom. I asked if they had seen us. The reply was 'yeah, we saw you go under us.' I stated we nearly collided. He said he was an instructor with an instrument student under the hood. We continued the flight to bwi. Comments: this aircraft made no radio calls on shd unicom. ZDC had us in radar contact at 2500 ft but 'had no contact of an aircraft at 4500 ft!' service by ATC for uncontrolled fields is poor.

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Original NASA ASRS Text

Title: NMAC BTWN AN LTT ACR AND AN SMA SINGLE ENG LAND TRAINING ACFT IN VFR CONDITIONS NEAR AN UNCTLED ARPT.

Narrative: ON JUL/THU/93, WE RECEIVED OUR CLRNC ON THE GND AT SHD FROM ZDC 135.40. WE WERE RELEASED BY CTR. WE ANNOUNCED TKOF ON RWY 23 WITH A L DOWNWIND DEP TO THE NE. THIS WAS XMITTED ON UNICOM. NO OTHER ACFT RESPONDED. ON CLBOUT APPROX 2500 FT WE CONTACTED CTR. WE WERE TOLD 'RADAR CONTACT.' WE THEN XMITTED AGAIN ON UNICOM OUR POS. NO OTHER ACFT RESPONSE. AT APPROX 4500-5000 FT (WE WERE CLRED TO 6000 FT) OUT OF NOWHERE CAME A SINGLE ENG ACFT AT 12 O'CLOCK. THE FO (PF) IMMEDIATELY PITCHED THE ACFT OVER. THE SMA WENT OVER US. THIS WAS VERY CLOSE. THERE IS NO DOUBT IN MY MIND THAT IF WE HAD NOT PITCHED DOWN, WE WOULD HAVE COLLIDED. THE DISTANCE WAS ABOUT 30 FT OR LESS. I ASKED CTR IF THEY HAD THE SINGLE ENG LAND SMA ON RADAR. HE SAID NO. I THEN SAID WE HAD HAD A NEAR MISS. HE STERNLY REPLIED HE HAD NO TFC. I THEN HEARD THE SMA ON UNICOM. I ASKED IF THEY HAD SEEN US. THE REPLY WAS 'YEAH, WE SAW YOU GO UNDER US.' I STATED WE NEARLY COLLIDED. HE SAID HE WAS AN INSTRUCTOR WITH AN INST STUDENT UNDER THE HOOD. WE CONTINUED THE FLT TO BWI. COMMENTS: THIS ACFT MADE NO RADIO CALLS ON SHD UNICOM. ZDC HAD US IN RADAR CONTACT AT 2500 FT BUT 'HAD NO CONTACT OF AN ACFT AT 4500 FT!' SVC BY ATC FOR UNCTLED FIELDS IS POOR.

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.