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Large transport flight crew on approach to dfw 1 mi outside the OM were advised by approach controller of low altitude warning. No indications in cockpit. Flight continued approach.
| Attributes | |
| ACN | 197603 |
| Time | |
| Date | 199112 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 2500 msl bound upper : 2500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 168 flight time total : 9567 flight time type : 1309 |
| ASRS Report | 197603 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
On final approach ILS 36L, just outside the OM, the tower announced that we had triggered their low altitude alert, and instructed us to check our altitude. I was flying the aircraft and we were on GS. The first officer told the controller that we were approaching the OM at 2500 ft, and that our altitude checked ok. Nothing more was said by the controller. We crossed the OM at the altitude depicted on the approach plate, and continued the approach to a normal landing. There were no flags or instrument malfunctions whatsoever during the entire approach. This event was obviously a false indication and alert on the part of ATC equipment.
Original NASA ASRS Text
Title: LGT FLC ON APCH TO DFW 1 MI OUTSIDE THE OM WERE ADVISED BY APCH CTLR OF LOW ALT WARNING. NO INDICATIONS IN COCKPIT. FLT CONTINUED APCH.
Narrative: ON FINAL APCH ILS 36L, JUST OUTSIDE THE OM, THE TWR ANNOUNCED THAT WE HAD TRIGGERED THEIR LOW ALT ALERT, AND INSTRUCTED US TO CHK OUR ALT. I WAS FLYING THE ACFT AND WE WERE ON GS. THE FO TOLD THE CTLR THAT WE WERE APCHING THE OM AT 2500 FT, AND THAT OUR ALT CHKED OK. NOTHING MORE WAS SAID BY THE CTLR. WE CROSSED THE OM AT THE ALT DEPICTED ON THE APCH PLATE, AND CONTINUED THE APCH TO A NORMAL LNDG. THERE WERE NO FLAGS OR INST MALFUNCTIONS WHATSOEVER DURING THE ENTIRE APCH. THIS EVENT WAS OBVIOUSLY A FALSE INDICATION AND ALERT ON THE PART OF ATC EQUIP.
Data retrieved from NASA's ASRS site as of July 2007 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.