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Air carrier X had near midair collision with non transponder aircraft within 30 mi veil of primary TCA airport. See and avoid concept.
| Attributes | |
| ACN | 257796 |
| Time | |
| Date | 199311 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : iad |
| State Reference | VA |
| Altitude | msl bound lower : 12500 msl bound upper : 12500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iad |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Route In Use | enroute : direct |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : developmental controller : radar |
| ASRS Report | 257796 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : nmac non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 0 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Air carrier X climbing wbound out of 12000 ft for 17000 ft approximately 15 mi southwest of dulles international airport, reported an aircraft pass under him approximately 300 ft. I observed no traffic. 10 seconds later I observed a 'primary target only' sbound. I advised air carrier X that I was tracking a target 5 mi south of his position, with no transponder or altitude squawk, and not in contact with this aircraft. He gave me a full description of the aircraft in question and I passed on the information appropriately.
Original NASA ASRS Text
Title: ACR X HAD NMAC WITH NON XPONDER ACFT WITHIN 30 MI VEIL OF PRIMARY TCA ARPT. SEE AND AVOID CONCEPT.
Narrative: ACR X CLBING WBOUND OUT OF 12000 FT FOR 17000 FT APPROX 15 MI SW OF DULLES INTL ARPT, RPTED AN ACFT PASS UNDER HIM APPROX 300 FT. I OBSERVED NO TFC. 10 SECONDS LATER I OBSERVED A 'PRIMARY TARGET ONLY' SBOUND. I ADVISED ACR X THAT I WAS TRACKING A TARGET 5 MI S OF HIS POS, WITH NO XPONDER OR ALT SQUAWK, AND NOT IN CONTACT WITH THIS ACFT. HE GAVE ME A FULL DESCRIPTION OF THE ACFT IN QUESTION AND I PASSED ON THE INFO APPROPRIATELY.
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.