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Flight crew of a B737-300 failed to maintain approach assigned altitude prior to the localizer marker after being cleared for the approach and having the runway in sight.
| Attributes | |
| ACN | 385428 |
| Time | |
| Date | 199711 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : btv |
| State Reference | VT |
| Altitude | msl bound lower : 1500 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : btv tower : btv |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 9000 flight time type : 4000 |
| ASRS Report | 385428 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 6000 |
| ASRS Report | 385440 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Btv approach cleared us for localizer runway 15 GS out, cross marker at 2000 ft. Also advised that aircraft were picking up runway visually at marker. We then switched over to tower frequency. We visually picked up runway prior to marker and started descent. At 1500 ft MSL tower advised us to maintain present altitude until the marker. Normal landing was accomplished.
Original NASA ASRS Text
Title: FLC OF A B737-300 FAILED TO MAINTAIN APCH ASSIGNED ALT PRIOR TO THE LOC MARKER AFTER BEING CLRED FOR THE APCH AND HAVING THE RWY IN SIGHT.
Narrative: BTV APCH CLRED US FOR LOC RWY 15 GS OUT, CROSS MARKER AT 2000 FT. ALSO ADVISED THAT ACFT WERE PICKING UP RWY VISUALLY AT MARKER. WE THEN SWITCHED OVER TO TWR FREQ. WE VISUALLY PICKED UP RWY PRIOR TO MARKER AND STARTED DSCNT. AT 1500 FT MSL TWR ADVISED US TO MAINTAIN PRESENT ALT UNTIL THE MARKER. NORMAL LNDG WAS ACCOMPLISHED.
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.