An air carrier B737 in descent to 11000 ft on the oxi arrival received a TCASII TA RA on a C414 climbing. Captain reacted by pulling the B737 up rapidly to miss the C414 and 2 flight attendants received minor injuries. The ARTCC radar controller apologized and stated he was in the midst of a handoff and was unable to call the TA.

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Attributes
ACN	370613
Time
Date	199706
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : oxi
State Reference	IN
Altitude	msl bound lower : 11000 msl bound upper : 11700
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other enroute airway : zau
Flight Plan	IFR
Aircraft 2
Make Model Name	Cessna 402/402C/B379 Businessliner/Utiliner
Operating Under FAR Part	other : unknown
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 5800 flight time type : 700
ASRS Report	370613
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 12000
ASRS Report	370693
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation 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 : 750 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X (B737-300) phl to ord on arrival (the knox 3) descending to 11000 ft, when passing through 12000 ft we got a TA at 11300 ft and climbing. We started a leveloff at 11700 ft at which time we received an RA, climb. We assumed control of aircraft from autoplt and abruptly pulled up to avoid traffic. We were IMC, however, did get close enough to see the twin cessna. Estimate on separation to be 200 ft vertical and less than 1/8 mi horizontally. Close enough to lettering and paint/color scheme. After takeoff passed we asked the ZAU controller about the traffic. His reply was he was on a handoff line and did not realize the climb rate of the cessna and apologized for the conflict. Thank god for the TCASII. Supplemental information from acn 370693: we then saw the cessna 414 a few hundred ft away, just below us. Captain pulled back on yoke abruptly to avoid hitting the cessna. 2 flight attendants were injured.

Original NASA ASRS Text

Title: AN ACR B737 IN DSCNT TO 11000 FT ON THE OXI ARR RECEIVED A TCASII TA RA ON A C414 CLBING. CAPT REACTED BY PULLING THE B737 UP RAPIDLY TO MISS THE C414 AND 2 FLT ATTENDANTS RECEIVED MINOR INJURIES. THE ARTCC RADAR CTLR APOLOGIZED AND STATED HE WAS IN THE MIDST OF A HDOF AND WAS UNABLE TO CALL THE TA.

Narrative: ACR X (B737-300) PHL TO ORD ON ARR (THE KNOX 3) DSNDING TO 11000 FT, WHEN PASSING THROUGH 12000 FT WE GOT A TA AT 11300 FT AND CLBING. WE STARTED A LEVELOFF AT 11700 FT AT WHICH TIME WE RECEIVED AN RA, CLB. WE ASSUMED CTL OF ACFT FROM AUTOPLT AND ABRUPTLY PULLED UP TO AVOID TFC. WE WERE IMC, HOWEVER, DID GET CLOSE ENOUGH TO SEE THE TWIN CESSNA. ESTIMATE ON SEPARATION TO BE 200 FT VERT AND LESS THAN 1/8 MI HORIZLY. CLOSE ENOUGH TO LETTERING AND PAINT/COLOR SCHEME. AFTER TKOF PASSED WE ASKED THE ZAU CTLR ABOUT THE TFC. HIS REPLY WAS HE WAS ON A HDOF LINE AND DID NOT REALIZE THE CLB RATE OF THE CESSNA AND APOLOGIZED FOR THE CONFLICT. THANK GOD FOR THE TCASII. SUPPLEMENTAL INFO FROM ACN 370693: WE THEN SAW THE CESSNA 414 A FEW HUNDRED FT AWAY, JUST BELOW US. CAPT PULLED BACK ON YOKE ABRUPTLY TO AVOID HITTING THE CESSNA. 2 FLT ATTENDANTS WERE INJURED.

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.