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Medium large transport flight crew inadvertently allow their aircraft to descend below the MSA during a visual approach causing ATC to advise of a low altitude warning.
| Attributes | |
| ACN | 538989 |
| Time | |
| Date | 200202 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : sjc.vor |
| State Reference | CA |
| Altitude | msl single value : 900 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : o90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 8500 flight time type : 3000 |
| ASRS Report | 538989 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other spatial deviation |
| Independent Detector | atc equipment : msaw other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On approach to sjc runway 30L, were cleared for visual approach at approximately 6000 ft MSL. Aircraft on GS. Set MDA in altitude alert window and descended to MDA. Aircraft TCASII inoperative caused distraction with multiple targets in descent. Distraction to look for aircraft caused crew to descend to approximately 900 ft MSL. Aircraft and ground separation was visual.
Original NASA ASRS Text
Title: MLG FLC INADVERTENTLY ALLOW THEIR ACFT TO DSND BELOW THE MSA DURING A VISUAL APCH CAUSING ATC TO ADVISE OF A LOW ALT WARNING.
Narrative: ON APCH TO SJC RWY 30L, WERE CLRED FOR VISUAL APCH AT APPROX 6000 FT MSL. ACFT ON GS. SET MDA IN ALT ALERT WINDOW AND DSNDED TO MDA. ACFT TCASII INOP CAUSED DISTR WITH MULTIPLE TARGETS IN DSCNT. DISTR TO LOOK FOR ACFT CAUSED CREW TO DSND TO APPROX 900 FT MSL. ACFT AND GND SEPARATION WAS VISUAL.
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.