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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier MD80 flight crew dscnds below assigned altitude. Captain went to vertical speed mode just before leveloff and descended 300 ft below assigned altitude.
| Attributes | |
| ACN | 399640 |
| Time | |
| Date | 199803 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : omn |
| State Reference | FL |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 210 flight time total : 7400 flight time type : 850 |
| ASRS Report | 399640 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met altitude deviation : overshoot non adherence : far non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Captain flying aircraft. Descent to 15000 ft at lamma int. He disengaged VNAV mode to try to smooth out level off with vertical speed mode. Altitude capture disengaged and aircraft descended to about 14700 ft before returning to 15000 ft.
Original NASA ASRS Text
Title: ACR MD80 FLC DSCNDS BELOW ASSIGNED ALT. CAPT WENT TO VERT SPEED MODE JUST BEFORE LEVELOFF AND DSNDED 300 FT BELOW ASSIGNED ALT.
Narrative: CAPT FLYING ACFT. DSCNT TO 15000 FT AT LAMMA INT. HE DISENGAGED VNAV MODE TO TRY TO SMOOTH OUT LEVEL OFF WITH VERT SPD MODE. ALT CAPTURE DISENGAGED AND ACFT DSNDED TO ABOUT 14700 FT BEFORE RETURNING TO 15000 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.