B737-300 crew and a C182 had less than legal separation in phx class B airspace.

Attributes
ACN	532384
Time
Date	200112
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phx.airport
State Reference	AZ
Altitude	msl single value : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : p50.tracon tower : crp.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : p50.tracon
Operator	general aviation : personal
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15300 flight time type : 9600
ASRS Report	532384
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical non adherence : published procedure non adherence : required legal separation non adherence : far other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	controller : issued alert flight crew : took evasive action none taken : detected after the fact other
Miss Distance	horizontal : 100 vertical : 600
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

While being vectored around phx to the north side. TRACON advised us of traffic 12 O'clock position and 7500 ft. TCASII TA'ed the traffic at 2 mi, showing 500 ft below us. Traffic then began climbing. The first officer disconnected the autoplt and initiated a climb. We crossed over the cessna nose-to-nose and down the left side approximately 100 ft horizontal and 600 ft vertical (TCASII) as we climbed through 8300 ft. 500 ft planned separation between a fast mover such as an airliner and a light aircraft doesn't seem like a great idea.

Original NASA ASRS Text

Title: B737-300 CREW AND A C182 HAD LESS THAN LEGAL SEPARATION IN PHX CLASS B AIRSPACE.

Narrative: WHILE BEING VECTORED AROUND PHX TO THE N SIDE. TRACON ADVISED US OF TFC 12 O'CLOCK POS AND 7500 FT. TCASII TA'ED THE TFC AT 2 MI, SHOWING 500 FT BELOW US. TFC THEN BEGAN CLBING. THE FO DISCONNECTED THE AUTOPLT AND INITIATED A CLB. WE CROSSED OVER THE CESSNA NOSE-TO-NOSE AND DOWN THE L SIDE APPROX 100 FT HORIZ AND 600 FT VERT (TCASII) AS WE CLBED THROUGH 8300 FT. 500 FT PLANNED SEPARATION BTWN A FAST MOVER SUCH AS AN AIRLINER AND A LIGHT ACFT DOESN'T SEEM LIKE A GREAT IDEA.

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.