B737 Next Generation Undifferentiated
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 91; Flight Crew Type 91
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
ATC Equipment / Nav Facility / Buildings
We were doing the RNAV Visual to Runway 31. Weather was not a factor. Autopilot was on; everything was set; stabilized; on path; pretty much a perfect approach; or so we thought. VASI was also red over white; so from our end there was nothing wrong. Tower gave us a low altitude alert asking us to check our altimeter setting immediately. We had no GPWS (Ground Proximity Warning System) warning; like I said we were right on profile. My concern is; why did the Tower give us that alert? If we got that alert; shouldn't every Company aircraft flying the RNAV Visual to 31 get the same alert? Is there something wrong with the procedure? Their equipment? Or did we make a mistake? If we did; we don't know what we could have done differently. Could you guys look into this? Is LGA handing out this warning to everyone? Because if we received this alert based on what we were doing; then everyone landing on 31 on the RNAV should be in the same place altitude and position as us plus or minus 10 feet?
Flight Crew flying 737NG aircraft received Alert from Air Traffic Control on approach.