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Air carrier large transport altitude deviation overshot while on radar vectors for visual approach to sna with altitude assignment.
| Attributes | |
| ACN | 183269 |
| Time | |
| Date | 199107 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sna |
| State Reference | CA |
| Altitude | msl bound lower : 2500 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : sna |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | approach : visual enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 22000 flight time type : 2500 |
| ASRS Report | 183269 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 13000 flight time type : 600 |
| ASRS Report | 183270 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 600 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While being vectored for an approach to runway 19R at sna, and descending to 3000', we received a RA on our TCAS to take immediate evasive action. We were in a turn and had visibility contact with the intruder. We disregarded the RA, but the distraction from the aural advisory caused us to descend below the 3000' altitude which we were cleared to. The distraction from the TCAS also masked the altitude alert warning.
Original NASA ASRS Text
Title: ACR LGT ALT DEVIATION OVERSHOT WHILE ON RADAR VECTORS FOR VISUAL APCH TO SNA WITH ALT ASSIGNMENT.
Narrative: WHILE BEING VECTORED FOR AN APCH TO RWY 19R AT SNA, AND DSNDING TO 3000', WE RECEIVED A RA ON OUR TCAS TO TAKE IMMEDIATE EVASIVE ACTION. WE WERE IN A TURN AND HAD VIS CONTACT WITH THE INTRUDER. WE DISREGARDED THE RA, BUT THE DISTR FROM THE AURAL ADVISORY CAUSED US TO DSND BELOW THE 3000' ALT WHICH WE WERE CLRED TO. THE DISTR FROM THE TCAS ALSO MASKED THE ALT ALERT WARNING.
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.