B737 descending for phx experienced near midair collision with cessna.

Attributes
ACN	583567
Time
Date	200305
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : pxr.vortac
State Reference	AZ
Altitude	msl bound lower : 8000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : p50.tracon tower : zzz.tower
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	descent : approach
Route In Use	arrival star : buntr 1
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 170 flight time total : 2050 flight time type : 930
ASRS Report	583567
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 1500 vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were on the buntr 1 arrival to phx. Landing runway to east on runway 7L/right and runway 8. Phoenix approach controller called out traffic at our 12 O'clock 5 mi, type and altitude unknown. I confirmed traffic on TCASII, no visual. Our aircraft was descending from 12000-8000 ft. At 9000 ft, approach control called out traffic again at our 12-1 O'clock, 2 mi. At this time, TCASII audio came on , target turn yellow and readout was 800 ft and closing. Soon after, the RA to climb called out. The captain disconnected all automation and set climb power. I was finally able to get a visual on the conflicting traffic. I called phx approach and announced 'air carrier X responding to an RA. We're climbing through 9000 ft.' the controller acknowledged our action and asked how close and location. Less than 1/4 mi and 200 ft to our 1 O'clock position. After we were 'clear of conflict,' we resumed our descent to 8000 ft. The aircraft was a 2-TONE brown and tan cessna (172, 182, or larger), at a cruise altitude of 8500 ft on an ene heading. Note: wrong altitude eastbound VFR. We resumed our arrival with no further problems.

Original NASA ASRS Text

Title: B737 DSNDING FOR PHX EXPERIENCED NMAC WITH CESSNA.

Narrative: WE WERE ON THE BUNTR 1 ARR TO PHX. LNDG RWY TO E ON RWY 7L/R AND RWY 8. PHOENIX APCH CTLR CALLED OUT TFC AT OUR 12 O'CLOCK 5 MI, TYPE AND ALT UNKNOWN. I CONFIRMED TFC ON TCASII, NO VISUAL. OUR ACFT WAS DSNDING FROM 12000-8000 FT. AT 9000 FT, APCH CTL CALLED OUT TFC AGAIN AT OUR 12-1 O'CLOCK, 2 MI. AT THIS TIME, TCASII AUDIO CAME ON , TARGET TURN YELLOW AND READOUT WAS 800 FT AND CLOSING. SOON AFTER, THE RA TO CLB CALLED OUT. THE CAPT DISCONNECTED ALL AUTOMATION AND SET CLB PWR. I WAS FINALLY ABLE TO GET A VISUAL ON THE CONFLICTING TFC. I CALLED PHX APCH AND ANNOUNCED 'ACR X RESPONDING TO AN RA. WE'RE CLBING THROUGH 9000 FT.' THE CTLR ACKNOWLEDGED OUR ACTION AND ASKED HOW CLOSE AND LOCATION. LESS THAN 1/4 MI AND 200 FT TO OUR 1 O'CLOCK POS. AFTER WE WERE 'CLR OF CONFLICT,' WE RESUMED OUR DSCNT TO 8000 FT. THE ACFT WAS A 2-TONE BROWN AND TAN CESSNA (172, 182, OR LARGER), AT A CRUISE ALT OF 8500 FT ON AN ENE HDG. NOTE: WRONG ALT EBOUND VFR. WE RESUMED OUR ARR WITH NO FURTHER PROBS.

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.