A319 flight crew reported responding to an RA on approach to lga.

Attributes
ACN	1350441
Time
Date	201604
Local Time Of Day	1201-1800
Place
Locale Reference	LGA.Airport
State Reference	NY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 13000 Flight Crew Type 2227
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 125
Events
Anomaly	Conflict NMAC Deviation - Altitude Excursion From Assigned Altitude

Narrative:

On descent into lga ATC issued a descent to 2500 ft and a clearance for the expressway visual runway 31 and a traffic advisory 'skyhawk traffic at 11 o'clock; they will maintain 2000 ft.' a short time later while level at 2500 ft with the autoflight system on we received a TCAS climb RA. We complied with the TCAS RA following flight manual procedure and advised ATC of the TCAS RA. The ATC controller acknowledged our RA. During the RA event; the PNF observed the TCAS intruder passing 100 below our aircraft on the TCAS display. We did not see the traffic visually. A normal approach and landing was accomplished at lga. I complied with the fom for reporting near midair collision.

Original NASA ASRS Text

Title: A319 flight crew reported responding to an RA on approach to LGA.

Narrative: On descent into LGA ATC issued a descent to 2500 ft and a clearance for the Expressway Visual RWY 31 and a traffic advisory 'Skyhawk traffic at 11 o'clock; they will maintain 2000 ft.' A short time later while level at 2500 ft with the autoflight system on we received a TCAS climb RA. We complied with the TCAS RA following flight manual procedure and advised ATC of the TCAS RA. The ATC controller acknowledged our RA. During the RA event; the PNF observed the TCAS intruder passing 100 below our aircraft on the TCAS display. We did not see the traffic visually. A normal approach and landing was accomplished at LGA. I complied with the FOM for reporting NMAC.

Data retrieved from NASA's ASRS site 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.