Cpr X had TCASII TA with VFR aircraft and failed to contact departure control.

Attributes
ACN	247273
Time
Date	199304
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : dpa
State Reference	IL
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Light	Night
Aircraft 1
Controlling Facilities	tracon : ord
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	other personnel other
Qualification	controller : radar
ASRS Report	247273
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 19
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Cpr X was released off dpa runway 19R assigned headings 220 degrees. Pilot advised he had had TCASII event with VFR Y approximately 4 southwest dpa airport. TCASII resulted in cpr X not being on any ATC frequency until about 7 southwest dpa airport. Workload: medium. Controller was working a combined sector. There could have been a clearance deviation but it's unknown -- possibly a heading deviation. There was no communication regarding the TCASII maneuver until it was over. TCASII was very disruptive to the controller's plans. This did have an affect on how the controller worked the airplane. The controller's plan was to climb on initial contact to 6000 ft to ensure separation with another aircraft. Pilots need to advise ATC what they're doing. Neither the radar controller nor dpa tower had communications with cpr X for 7 mi.

Original NASA ASRS Text

Title: CPR X HAD TCASII TA WITH VFR ACFT AND FAILED TO CONTACT DEP CTL.

Narrative: CPR X WAS RELEASED OFF DPA RWY 19R ASSIGNED HDGS 220 DEGS. PLT ADVISED HE HAD HAD TCASII EVENT WITH VFR Y APPROX 4 SW DPA ARPT. TCASII RESULTED IN CPR X NOT BEING ON ANY ATC FREQ UNTIL ABOUT 7 SW DPA ARPT. WORKLOAD: MEDIUM. CTLR WAS WORKING A COMBINED SECTOR. THERE COULD HAVE BEEN A CLRNC DEV BUT IT'S UNKNOWN -- POSSIBLY A HDG DEV. THERE WAS NO COM REGARDING THE TCASII MANEUVER UNTIL IT WAS OVER. TCASII WAS VERY DISRUPTIVE TO THE CTLR'S PLANS. THIS DID HAVE AN AFFECT ON HOW THE CTLR WORKED THE AIRPLANE. THE CTLR'S PLAN WAS TO CLB ON INITIAL CONTACT TO 6000 FT TO ENSURE SEPARATION WITH ANOTHER ACFT. PLTS NEED TO ADVISE ATC WHAT THEY'RE DOING. NEITHER THE RADAR CTLR NOR DPA TWR HAD COMS WITH CPR X FOR 7 MI.

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.