Evasive action by cpr-light transport to avoid collision with climbing air carrier-large transport.

Attributes
ACN	88656
Time
Date	198806
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : iow airport : ord
State Reference	IA
Altitude	msl bound lower : 11500 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 250 flight time total : 5000 flight time type : 2000
ASRS Report	88656
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : atp pilot : cfi pilot : flight engineer
ASRS Report	88802
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 1500 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was the PF and just started to accelerate at about 10800'. At approximately 12000' the captain saw on his side of the airplane another twin which he said was taking evasive action to miss us. We reported the occurrence to ATC and they said there was an light transport in our vicinity which had broke his altitude. Supplemental information from acn 88802: I asked for a phone number to call the controller in ord. I called at xapm but the controller had gone home for the evening. He left his home phone number, but I elected not to call him at home. At time of the encounter I had assigned both myself and the second officer traffic watch. All of our lights were on per company SOP. I feel that these lights, required to be on until reaching 18000', helped to prevent a major accident as did the new company SOP of assigning a formal traffic watch. Supplemental information from acn 88802: later chicago center supervisor indicated possible controller error and the other aircraft was an light transport. Estimated closest sep was 1200'.

Original NASA ASRS Text

Title: EVASIVE ACTION BY CPR-LTT TO AVOID COLLISION WITH CLIMBING ACR-LGT.

Narrative: I WAS THE PF AND JUST STARTED TO ACCELERATE AT ABOUT 10800'. AT APPROX 12000' THE CAPT SAW ON HIS SIDE OF THE AIRPLANE ANOTHER TWIN WHICH HE SAID WAS TAKING EVASIVE ACTION TO MISS US. WE RPTED THE OCCURRENCE TO ATC AND THEY SAID THERE WAS AN LTT IN OUR VICINITY WHICH HAD BROKE HIS ALT. SUPPLEMENTAL INFO FROM ACN 88802: I ASKED FOR A PHONE NUMBER TO CALL THE CTLR IN ORD. I CALLED AT XAPM BUT THE CTLR HAD GONE HOME FOR THE EVENING. HE LEFT HIS HOME PHONE NUMBER, BUT I ELECTED NOT TO CALL HIM AT HOME. AT TIME OF THE ENCOUNTER I HAD ASSIGNED BOTH MYSELF AND THE S/O TFC WATCH. ALL OF OUR LIGHTS WERE ON PER COMPANY SOP. I FEEL THAT THESE LIGHTS, REQUIRED TO BE ON UNTIL REACHING 18000', HELPED TO PREVENT A MAJOR ACCIDENT AS DID THE NEW COMPANY SOP OF ASSIGNING A FORMAL TFC WATCH. SUPPLEMENTAL INFO FROM ACN 88802: LATER CHICAGO CENTER SUPVR INDICATED POSSIBLE CTLR ERROR AND THE OTHER ACFT WAS AN LTT. ESTIMATED CLOSEST SEP WAS 1200'.

Data retrieved from NASA's ASRS site as of August 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.