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Large transport flight crew descended below the floor of the TCA in an area designated 18-70. The large transport was at 1100' and 10 miles from runway. Approach controller issued a low altitude alert through the ATCT local controller.
| Attributes | |
| ACN | 171621 |
| Time | |
| Date | 199102 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : iah |
| State Reference | TX |
| Altitude | msl bound lower : 1100 msl bound upper : 1100 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : iah tower : iah |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | approach : straight in approach : visual arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 7 |
| ASRS Report | 171621 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | non adherence : far other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Large transport on approach to runway 26 iah. The aircraft was cleared for a visibility approach and descended below the TCA at 10 mi from airport. The large transport was at 1100'. The controller recieved a low altitude alert, to which he advised tower controller to have aircraft check its altitude. The aircraft crossed the OM at 1000' and stayed at that altitude until approximately 2 mi final to runway 26. Did not appear that crew flew aircraft at or above G/south for runway 26, which had mandatory crossing of 2000', which the company policy calls for, or used all available navaids during approach.
Original NASA ASRS Text
Title: LGT FLT CREW DESCENDED BELOW THE FLOOR OF THE TCA IN AN AREA DESIGNATED 18-70. THE LGT WAS AT 1100' AND 10 MILES FROM RWY. APCH CTLR ISSUED A LOW ALT ALERT THROUGH THE ATCT LCL CTLR.
Narrative: LGT ON APCH TO RWY 26 IAH. THE ACFT WAS CLRED FOR A VIS APCH AND DSNDED BELOW THE TCA AT 10 MI FROM ARPT. THE LGT WAS AT 1100'. THE CTLR RECIEVED A LOW ALT ALERT, TO WHICH HE ADVISED TWR CTLR TO HAVE ACFT CHK ITS ALT. THE ACFT CROSSED THE OM AT 1000' AND STAYED AT THAT ALT UNTIL APPROX 2 MI FINAL TO RWY 26. DID NOT APPEAR THAT CREW FLEW ACFT AT OR ABOVE G/S FOR RWY 26, WHICH HAD MANDATORY XING OF 2000', WHICH THE COMPANY POLICY CALLS FOR, OR USED ALL AVAILABLE NAVAIDS DURING APCH.
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.