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An SF340 crew temporarily loses control of the aircraft on final approach due to an autoplt response to the mode selected.
| Attributes | |
| ACN | 436387 |
| Time | |
| Date | 199905 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dtw.airport |
| State Reference | MI |
| Altitude | msl bound lower : 4200 msl bound upper : 4800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d21.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 21r |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : cfi pilot : multi engine |
| Experience | flight time last 90 days : 240 flight time total : 2200 flight time type : 700 |
| ASRS Report | 436387 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to original clearance flight crew : returned to intended or assigned course flight crew : regained aircraft control flight crew : overrode automation |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
Flight was descending to 4000 ft when cleared for the visual approach to runway 21R at dtw. At 4200 ft, power was added for the leveloff when the airplane began to climb. The aircraft gained approximately 500-600 ft before the autoplt was disconnected. The autoplt was in the approach mode when this event occurred. The captain returned the aircraft to the normal approach attitude. A normal landing was made and no conflict was reported by ATC (approach).
Original NASA ASRS Text
Title: AN SF340 CREW TEMPORARILY LOSES CTL OF THE ACFT ON FINAL APCH DUE TO AN AUTOPLT RESPONSE TO THE MODE SELECTED.
Narrative: FLT WAS DSNDING TO 4000 FT WHEN CLRED FOR THE VISUAL APCH TO RWY 21R AT DTW. AT 4200 FT, PWR WAS ADDED FOR THE LEVELOFF WHEN THE AIRPLANE BEGAN TO CLB. THE ACFT GAINED APPROX 500-600 FT BEFORE THE AUTOPLT WAS DISCONNECTED. THE AUTOPLT WAS IN THE APCH MODE WHEN THIS EVENT OCCURRED. THE CAPT RETURNED THE ACFT TO THE NORMAL APCH ATTITUDE. A NORMAL LNDG WAS MADE AND NO CONFLICT WAS RPTED BY ATC (APCH).
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.