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Captain of an large transport descended below the GS during an ILS approach resulting in an altitude alert by ATC.
| Attributes | |
| ACN | 324950 |
| Time | |
| Date | 199512 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : den |
| State Reference | CO |
| Altitude | agl bound lower : 1300 agl bound upper : 1300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : den |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | other other : other pilot : atp pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 30 flight time total : 7500 flight time type : 200 |
| ASRS Report | 324950 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : published procedure other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
VFR cleared to land at den. On final approach talking to approach control with localizer and GS up and working. I was the flight engineer. The captain misjudged distance to runway and altitude and drifted below GS. Controller stated 'air carrier, altitude alert.' the captain corrected immediately. No further problems.
Original NASA ASRS Text
Title: CAPT OF AN LGT DSNDED BELOW THE GS DURING AN ILS APCH RESULTING IN AN ALT ALERT BY ATC.
Narrative: VFR CLRED TO LAND AT DEN. ON FINAL APCH TALKING TO APCH CTL WITH LOC AND GS UP AND WORKING. I WAS THE FE. THE CAPT MISJUDGED DISTANCE TO RWY AND ALT AND DRIFTED BELOW GS. CTLR STATED 'ACR, ALT ALERT.' THE CAPT CORRECTED IMMEDIATELY. NO FURTHER PROBS.
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.