A319 flight crew has a TCAS RA during approach to lga.

Attributes
ACN	721035
Time
Date	200612
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : lga.vor
State Reference	NY
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : n90.tracon
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 400 flight time total : 25000 flight time type : 2500
ASRS Report	721035
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued advisory flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500 vertical : 400
Supplementary
Problem Areas	Airspace Structure ATC Human Performance Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

We were level at 4000 ft MSL; on new york approach inbound. ATC mentioned traffic at 11 O'clock and 5 mi. We did not have contact and told ATC we had no contact with the cessna traffic. Our TCAS squawked an RA to climb. I; the captain; responded as per our procedures; climbing to avoid any possible conflict. We notified ATC of our action and when 'clear of conflict;' descended as per ATC.

Original NASA ASRS Text

Title: A319 FLT CREW HAS A TCAS RA DURING APCH TO LGA.

Narrative: WE WERE LEVEL AT 4000 FT MSL; ON NEW YORK APCH INBOUND. ATC MENTIONED TFC AT 11 O'CLOCK AND 5 MI. WE DID NOT HAVE CONTACT AND TOLD ATC WE HAD NO CONTACT WITH THE CESSNA TFC. OUR TCAS SQUAWKED AN RA TO CLB. I; THE CAPT; RESPONDED AS PER OUR PROCS; CLBING TO AVOID ANY POSSIBLE CONFLICT. WE NOTIFIED ATC OF OUR ACTION AND WHEN 'CLR OF CONFLICT;' DSNDED AS PER ATC.

Data retrieved from NASA's ASRS site as of January 2009 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.