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Flight crew of an light transport cpr jet overshot descent altitude due to the autoplt failing to capture selected altitude.
| Attributes | |
| ACN | 306490 |
| Time | |
| Date | 199506 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dyr |
| State Reference | TN |
| Altitude | msl bound lower : 15500 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : hnl |
| Operator | general aviation : corporate |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other enroute airway : zme |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 36 flight time total : 7600 flight time type : 2000 |
| ASRS Report | 306490 |
| Person 2 | |
| Affiliation | Other |
| 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 flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft was on a flight from spirit of st. Louis (sus) to dyersburg (dys). Cruising altitude was FL230. ZMP cleared aircraft for arrival descend into dys from FL230 to 16000 ft MSL. Airport autoplt was engaged with navigation, vertical speed and altitude select, selected on the flight director mode control panel. As aircraft descended through 16000 ft MSL at approximately a rate of descent of 1500 FPM. Pilot noticed altitude select light off. Pilot assumed control of the aircraft at 15700 ft MSL and initiated climb back to 16000 ft MSL. During deviation aircraft descended to approximately 15500 ft MSL. Aircraft was leveled at 16000 ft MSL and flight was continued into dys. Entire deviation lasted 5-10 seconds.
Original NASA ASRS Text
Title: FLC OF AN LTT CPR JET OVERSHOT DSCNT ALT DUE TO THE AUTOPLT FAILING TO CAPTURE SELECTED ALT.
Narrative: ACFT WAS ON A FLT FROM SPIRIT OF ST. LOUIS (SUS) TO DYERSBURG (DYS). CRUISING ALT WAS FL230. ZMP CLRED ACFT FOR ARR DSND INTO DYS FROM FL230 TO 16000 FT MSL. ARPT AUTOPLT WAS ENGAGED WITH NAV, VERT SPD AND ALT SELECT, SELECTED ON THE FLT DIRECTOR MODE CTL PANEL. AS ACFT DSNDED THROUGH 16000 FT MSL AT APPROX A RATE OF DSCNT OF 1500 FPM. PLT NOTICED ALT SELECT LIGHT OFF. PLT ASSUMED CTL OF THE ACFT AT 15700 FT MSL AND INITIATED CLB BACK TO 16000 FT MSL. DURING DEV ACFT DSNDED TO APPROX 15500 FT MSL. ACFT WAS LEVELED AT 16000 FT MSL AND FLT WAS CONTINUED INTO DYS. ENTIRE DEV LASTED 5-10 SECONDS.
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.