Air carrier's X and Y TCASII RA with VFR aircraft Z with 500 ft separation. Evasive action taken.

Attributes
ACN	247001
Time
Date	199303
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 9500 msl bound upper : 10000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	VFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	other personnel other
Qualification	controller : radar
ASRS Report	247001
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

VFR aircraft Y at 9500 ft 16 mi northeast of ord. Traffic was issued and controller advised air carrier X the altitude of the VFR aircraft was verified by his company. Air carrier X then responded to a TCASII RA and climbed to 10500 ft. A different airplane same VFR traffic. Traffic information was issued and air carrier Y reported the traffic in sight. He then responded to a TCASII RA and climbed to 10200 ft.

Original NASA ASRS Text

Title: ACR'S X AND Y TCASII RA WITH VFR ACFT Z WITH 500 FT SEPARATION. EVASIVE ACTION TAKEN.

Narrative: VFR ACFT Y AT 9500 FT 16 MI NE OF ORD. TFC WAS ISSUED AND CTLR ADVISED ACR X THE ALT OF THE VFR ACFT WAS VERIFIED BY HIS COMPANY. ACR X THEN RESPONDED TO A TCASII RA AND CLBED TO 10500 FT. A DIFFERENT AIRPLANE SAME VFR TFC. TFC INFO WAS ISSUED AND ACR Y RPTED THE TFC IN SIGHT. HE THEN RESPONDED TO A TCASII RA AND CLBED TO 10200 FT.

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.