Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP)
Confusion; Troubleshooting
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Became Reoriented; Flight Crew Requested ATC Assistance / Clarification
Equipment / Tooling; Airport
RNAV Y (GPS) 22. Approaching 800 ft AGL got a call from tower about a low altitude alert for our approach. We double checked the lateral and vertical NAV and we were established; according to our instruments; correct on Vertical NAV and correct on the lateral NAV track.  Just after this call we obtained visual with the runway environment. It showed us slightly left of runway centerline and slightly below the PAPI glidepath which at the time was showing 1 white and 3 reds. Decreased descent rate and adjusted back to centerline for uneventful landing. On taxi-in; asked tower about the alert and the reply was they might need to recalibrate their system.
[Report narrative contained no additional information.]
Air Carrier flight crew reported that the low altitude alert for the airport may be in error and need re-calibration.