Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
ATC Issue All Types
ATC Equipment / Nav Facility / Buildings; Procedure
On RNAV (Area Navigation) Visual 31 Approach at 1000'; LGA Tower reported a 'low altitude' alert on us even though we were on the correct VNAV (Vertical Navigation) and LNAV (Lateral Navigation) profile. I leveled off and both Pilots verified we had the correct altimeter setting and were at or above the VNAV profile. I was visual with the runway and showed we were high on the PAPI Precision Approach Path Indicator) as well. I corrected our vertical path back to the RNAVS and visual flight path and landed in the touchdown zone without further incident. After landing; LGA Tower confirmed they have been having erroneous 'low altitude alerts' with other flights in the same area. LGA should check their altitude alerting information to insure it is giving accurate data.
Air carrier flight crew reported receiving a low altitude warning from tower despite cockpit instruments showing that they were above the RNAV glidepath.