Near midair collision. TA not given.

Attributes
ACN	270639
Time
Date	199405
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : aml airport : iad
State Reference	VA
Altitude	msl bound lower : 6500 msl bound upper : 6500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iad
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 3200 flight time type : 200
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 : insufficient time
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 75
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

We were on an IFR clearance cleared to descend from 7000 ft to 5000 ft. The captain (PF) noticed a small high winged airplane fly underneath us. He came under the left wing at a 90 degree angle and we just missed him by about 50 to 100 ft. We were around 6500 ft at the time. We had no time to take any evasive action. We (captain) immediately asked ATC if they had any traffic in our area and they replied in the negative. Later, when the captain called ATC on the phone, they said that they did have him on radar. They said he was flying at 6500 ft. I (the first officer) never saw the other aircraft at any time.

Original NASA ASRS Text

Title: NMAC. TA NOT GIVEN.

Narrative: WE WERE ON AN IFR CLRNC CLRED TO DSND FROM 7000 FT TO 5000 FT. THE CAPT (PF) NOTICED A SMALL HIGH WINGED AIRPLANE FLY UNDERNEATH US. HE CAME UNDER THE L WING AT A 90 DEG ANGLE AND WE JUST MISSED HIM BY ABOUT 50 TO 100 FT. WE WERE AROUND 6500 FT AT THE TIME. WE HAD NO TIME TO TAKE ANY EVASIVE ACTION. WE (CAPT) IMMEDIATELY ASKED ATC IF THEY HAD ANY TFC IN OUR AREA AND THEY REPLIED IN THE NEGATIVE. LATER, WHEN THE CAPT CALLED ATC ON THE PHONE, THEY SAID THAT THEY DID HAVE HIM ON RADAR. THEY SAID HE WAS FLYING AT 6500 FT. I (THE FO) NEVER SAW THE OTHER ACFT AT ANY TIME.

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.