A cpr flight crew in a C750 had an near midair collision with another cessna while being vectored by approach controller. They reacted to their TCASII's RA.

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Attributes
ACN	391215
Time
Date	199801
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : pxr airport : phx
State Reference	AZ
Altitude	msl bound lower : 4000 msl bound upper : 4700
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : phx
Operator	general aviation : corporate
Make Model Name	Cessna Citation Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 4000 flight time type : 200
ASRS Report	391215
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : nmac 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 : 500 vertical : 300

Narrative:

While on a vector from phoenix TRACON at 4000 ft MSL we were responding to an RA from the TCASII. We deviated from altitude by 700 ft up. We were asked about the deviation, but were not given the opportunity to respond to the controller and advise him of the TCASII warning and subsequent near miss.

Original NASA ASRS Text

Title: A CPR FLC IN A C750 HAD AN NMAC WITH ANOTHER CESSNA WHILE BEING VECTORED BY APCH CTLR. THEY REACTED TO THEIR TCASII'S RA.

Narrative: WHILE ON A VECTOR FROM PHOENIX TRACON AT 4000 FT MSL WE WERE RESPONDING TO AN RA FROM THE TCASII. WE DEVIATED FROM ALT BY 700 FT UP. WE WERE ASKED ABOUT THE DEV, BUT WERE NOT GIVEN THE OPPORTUNITY TO RESPOND TO THE CTLR AND ADVISE HIM OF THE TCASII WARNING AND SUBSEQUENT NEAR MISS.

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.