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B737-800 flight crew descended below the published procedure approach altitude due to an incorrect altitude set in the mode control panel for that segment of the procedure.
| Attributes | |
| ACN | 527609 |
| Time | |
| Date | 200110 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sfo.airport |
| State Reference | CA |
| Altitude | msl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : o90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | approach : charted visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 80 flight time total : 6500 flight time type : 80 |
| ASRS Report | 527609 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance other spatial deviation |
| Independent Detector | atc equipment : msaw other controllera |
| Resolutory Action | controller : issued alert other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Flight cleared for and flying FMS bridge visual runway 28R at sfo. Descended below 1800 ft at samul. ATC bay approach broadcasted on approach frequency an altitude alert, regarding our altitude (aprox 1500 ft MSL) at samul san mateo bridge. Attribute this altitude deviation to an incorrect altitude set in the mode control panel for that segment of the procedure.
Original NASA ASRS Text
Title: B737-800 FLC DSNDED BELOW THE PUBLISHED PROC APCH ALT DUE TO AN INCORRECT ALT SET IN THE MODE CTL PANEL FOR THAT SEGMENT OF THE PROC.
Narrative: FLT CLRED FOR AND FLYING FMS BRIDGE VISUAL RWY 28R AT SFO. DSNDED BELOW 1800 FT AT SAMUL. ATC BAY APCH BROADCASTED ON APCH FREQ AN ALT ALERT, REGARDING OUR ALT (APROX 1500 FT MSL) AT SAMUL SAN MATEO BRIDGE. ATTRIBUTE THIS ALT DEV TO AN INCORRECT ALT SET IN THE MODE CTL PANEL FOR THAT SEGMENT OF THE PROCEDURE.
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.