Near midair collision turned into potential conflict by TCASII RA and flight crew's response in evas...

Attributes
ACN	247191
Time
Date	199307
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : iiu airport : sdf
State Reference	KY
Altitude	msl bound lower : 11000 msl bound upper : 12500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid tracon : sdf
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 1000
ASRS Report	247191
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : instrument pilot : atp pilot : commercial pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 1000
ASRS Report	247927
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 400 vertical : 600
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

At handoff from ZID to sdf approach at 11000 ft, we got an RA on TCASII and immediately initiated a TCASII climb. The TCASII traffic showed the conflict to be at 12 O'clock position and 3 mi and 300 ft below us, and climbing. We climbed approximately 1500 ft above our assigned altitude. After advising sdf approach of this deviation, I asked if they had the traffic on their radar and was told they did at 11100 ft. This entire event took about 20 seconds from the time ZID gave us the frequency change. On the ground, I contacted ZID by phone and spoke to the supervisor to ask why no one spoke up about the traffic. I was told the traffic was VFR at 10000 ft and 10 mi and must have initiated a climb at the time of the handoff. They were aware that the traffic was there, but no one reported the traffic to us. Thanks to TCASII. It performed well.

Original NASA ASRS Text

Title: NMAC TURNED INTO POTENTIAL CONFLICT BY TCASII RA AND FLC'S RESPONSE IN EVASIVE ACTION CLB.

Narrative: AT HDOF FROM ZID TO SDF APCH AT 11000 FT, WE GOT AN RA ON TCASII AND IMMEDIATELY INITIATED A TCASII CLB. THE TCASII TFC SHOWED THE CONFLICT TO BE AT 12 O'CLOCK POS AND 3 MI AND 300 FT BELOW US, AND CLBING. WE CLBED APPROX 1500 FT ABOVE OUR ASSIGNED ALT. AFTER ADVISING SDF APCH OF THIS DEV, I ASKED IF THEY HAD THE TFC ON THEIR RADAR AND WAS TOLD THEY DID AT 11100 FT. THIS ENTIRE EVENT TOOK ABOUT 20 SECONDS FROM THE TIME ZID GAVE US THE FREQ CHANGE. ON THE GND, I CONTACTED ZID BY PHONE AND SPOKE TO THE SUPVR TO ASK WHY NO ONE SPOKE UP ABOUT THE TFC. I WAS TOLD THE TFC WAS VFR AT 10000 FT AND 10 MI AND MUST HAVE INITIATED A CLB AT THE TIME OF THE HDOF. THEY WERE AWARE THAT THE TFC WAS THERE, BUT NO ONE RPTED THE TFC TO US. THANKS TO TCASII. IT PERFORMED WELL.

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.

Near midair collision turned into potential conflict by TCASII RA and flight crew's response in evasive action climb.