Air carrier flight crew reported that the low altitude alert for the airport may be in error and nee...

Attributes
ACN	1434382
Time
Date	201703
Local Time Of Day	0001-0600
Place
Locale Reference	SAT.Airport
State Reference	TX
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Other RNAV Y (GPS) 22
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy

Narrative:

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 navigation and we were established; according to our instruments; correct on vertical navigation and correct on the lateral navigation 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.

Original NASA ASRS Text

Title: Air Carrier flight crew reported that the low altitude alert for the airport may be in error and need re-calibration.

Narrative: 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.

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.

Air carrier flight crew reported that the low altitude alert for the airport may be in error and need re-calibration.