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Captain of an atx small transport turboprop overshot assigned altitude during departure climb due to the failure of the autoplt to capture the set altitude. Departure controller also noticed the overshoot as the pilot was correcting back.
| Attributes | |
| ACN | 419670 |
| Time | |
| Date | 199811 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : msp airport : stp |
| State Reference | MS |
| Altitude | msl bound lower : 6000 msl bound upper : 6300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : msp tower : las |
| Operator | common carrier : air taxi |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 600 flight time total : 2550 flight time type : 250 |
| ASRS Report | 419670 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera 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:
Climbing out of stp, cleared to 6000 ft. Autoplt on. Autoplt did not capture the final altitude of 6000 ft. I noticed that the capture annunciator did not illuminate 200 ft prior to the assigned altitude. Vertical speed was 2000 FPM. Due to passenger comfort, I overshot the altitude by 300 ft. I corrected the altitude as soon as possible. The departure controller verified leveling at 6000 ft and the copilot responded that we were correcting.
Original NASA ASRS Text
Title: CAPT OF AN ATX SMT TURBOPROP OVERSHOT ASSIGNED ALT DURING DEP CLB DUE TO THE FAILURE OF THE AUTOPLT TO CAPTURE THE SET ALT. DEP CTLR ALSO NOTICED THE OVERSHOOT AS THE PLT WAS CORRECTING BACK.
Narrative: CLBING OUT OF STP, CLRED TO 6000 FT. AUTOPLT ON. AUTOPLT DID NOT CAPTURE THE FINAL ALT OF 6000 FT. I NOTICED THAT THE CAPTURE ANNUNCIATOR DID NOT ILLUMINATE 200 FT PRIOR TO THE ASSIGNED ALT. VERT SPD WAS 2000 FPM. DUE TO PAX COMFORT, I OVERSHOT THE ALT BY 300 FT. I CORRECTED THE ALT ASAP. THE DEP CTLR VERIFIED LEVELING AT 6000 FT AND THE COPLT RESPONDED THAT WE WERE CORRECTING.
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.