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Flight crew of medium large transport on descent with autoplt engaged has altitude deviation when altitude capture malfunctioned.
| Attributes | |
| ACN | 413080 |
| Time | |
| Date | 199809 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : las |
| State Reference | NV |
| Altitude | msl bound lower : 15600 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 80 flight time total : 3600 flight time type : 500 |
| ASRS Report | 413080 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On descent to land las, assigned descent to 16000 ft. Autoplt was on but failed to capture assigned altitude. I was slow to correct the situation and descended to 15600 ft before correcting back. I realize now I should have monitored the descent more closely and pressed the aircraft's altitude hold button when the autoplt did not capture 16000 ft.
Original NASA ASRS Text
Title: FLC OF MLG ON DSCNT WITH AUTOPLT ENGAGED HAS ALTDEV WHEN ALT CAPTURE MALFUNCTIONED.
Narrative: ON DSCNT TO LAND LAS, ASSIGNED DSCNT TO 16000 FT. AUTOPLT WAS ON BUT FAILED TO CAPTURE ASSIGNED ALT. I WAS SLOW TO CORRECT THE SIT AND DSNDED TO 15600 FT BEFORE CORRECTING BACK. I REALIZE NOW I SHOULD HAVE MONITORED THE DSCNT MORE CLOSELY AND PRESSED THE ACFT'S ALT HOLD BUTTON WHEN THE AUTOPLT DID NOT CAPTURE 16000 FT.
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.