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Flight crew on autoplt allowed the climb to pass the assigned altitude 300 ft in order to effect a smooth level off when the autoplt did not capture the altitude.
| Attributes | |
| ACN | 330100 |
| Time | |
| Date | 199602 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : iah |
| State Reference | TX |
| Altitude | msl bound lower : 21000 msl bound upper : 21300 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | B737-500 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 18000 |
| ASRS Report | 330100 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 9900 flight time type : 3500 |
| ASRS Report | 329434 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Autoplt system 'a' failed to level off at FL210, overshot to FL213, then was corrected -- same thing happened on 'B' autoplt system -- barometer on altimeter was set to 29.92. Corrective action was taken to level aircraft in a smooth manner. Supplemental information from acn 329434: the aircraft continued through FL210 up to approximately 21300 ft.
Original NASA ASRS Text
Title: FLC ON AUTOPLT ALLOWED THE CLB TO PASS THE ASSIGNED ALT 300 FT IN ORDER TO EFFECT A SMOOTH LEVEL OFF WHEN THE AUTOPLT DID NOT CAPTURE THE ALT.
Narrative: AUTOPLT SYS 'A' FAILED TO LEVEL OFF AT FL210, OVERSHOT TO FL213, THEN WAS CORRECTED -- SAME THING HAPPENED ON 'B' AUTOPLT SYS -- BAROMETER ON ALTIMETER WAS SET TO 29.92. CORRECTIVE ACTION WAS TAKEN TO LEVEL ACFT IN A SMOOTH MANNER. SUPPLEMENTAL INFO FROM ACN 329434: THE ACFT CONTINUED THROUGH FL210 UP TO APPROX 21300 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.