Another 'kudo' for TCASII in flight crew reported near midair collision.

Attributes
ACN	266809
Time
Date	199403
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : iad
State Reference	VA
Altitude	msl bound lower : 11000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iad
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : cfi pilot : atp pilot : instrument
Experience	flight time last 90 days : 220 flight time total : 9000 flight time type : 500
ASRS Report	266809
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 500 vertical : 350
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On EMI2 arrival, level at 11000 ft, 290 KTS, we got a TA on TCASII. A target showed 12 O'clock and 3-4 mi below us opposite direction. We had no visual contact even though it was a bright clear day. At the time, the target was 1000 ft below us and level. Then he started to climb. The TA went to an RA 'climb, climb.' the first officer was flying and we immediately complied with TCASII. The first officer saw the aircraft out of his window as maneuver was being performed. He said it was a twin engine aircraft with a 'T' tail in a 20-30 degree banked turn to miss us. The first officer said 'we would have impacted had we not started a go around.' ATC issued no advisories. ATC was aware of problem after I told him we had departed our assigned altitude for TCASII RA. He then saw a VFR target 400 ft below us. We filed a 'near midair collision report.' we are very thankful for TCASII.

Original NASA ASRS Text

Title: ANOTHER 'KUDO' FOR TCASII IN FLC RPTED NMAC.

Narrative: ON EMI2 ARR, LEVEL AT 11000 FT, 290 KTS, WE GOT A TA ON TCASII. A TARGET SHOWED 12 O'CLOCK AND 3-4 MI BELOW US OPPOSITE DIRECTION. WE HAD NO VISUAL CONTACT EVEN THOUGH IT WAS A BRIGHT CLR DAY. AT THE TIME, THE TARGET WAS 1000 FT BELOW US AND LEVEL. THEN HE STARTED TO CLB. THE TA WENT TO AN RA 'CLB, CLB.' THE FO WAS FLYING AND WE IMMEDIATELY COMPLIED WITH TCASII. THE FO SAW THE ACFT OUT OF HIS WINDOW AS MANEUVER WAS BEING PERFORMED. HE SAID IT WAS A TWIN ENG ACFT WITH A 'T' TAIL IN A 20-30 DEG BANKED TURN TO MISS US. THE FO SAID 'WE WOULD HAVE IMPACTED HAD WE NOT STARTED A GAR.' ATC ISSUED NO ADVISORIES. ATC WAS AWARE OF PROB AFTER I TOLD HIM WE HAD DEPARTED OUR ASSIGNED ALT FOR TCASII RA. HE THEN SAW A VFR TARGET 400 FT BELOW US. WE FILED A 'NMAC RPT.' WE ARE VERY THANKFUL FOR TCASII.

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.