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Large transport air carrier aircraft on approach vector with a heading turn, reporter captain selected the heading mode, and as the autoplt commenced the turn it overbanked past 30 degrees and the stick shaker sounded warning of impending stall. Reporter applied maximum power and took control of aircraft. Aircraft was 7 KTS above minimum speed for flaps.
| Attributes | |
| ACN | 386190 |
| Time | |
| Date | 199711 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : mci |
| State Reference | MO |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : mci |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other descent : approach |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 85 flight time total : 15000 flight time type : 2000 |
| ASRS Report | 386190 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : regained aircraft control flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On approach to mci we were assigned heading 010 degrees, 4000 ft, and 190 KTS. The autoplt was in use in heading mode and altitude armed. In the turn to 010 degrees the autoplt exceeded 30 degrees bank and stick shaker went off. Maximum power was applied and positive control of aircraft was taken. At our weight 183 KTS was flaps 2 minimum. We were at flaps 2 190 KTS when shaker went off. Autoplt was written up and the roll control in heading mode was deemed inoperative in mci.
Original NASA ASRS Text
Title: LGT ACR ACFT ON APCH VECTOR WITH A HDG TURN, RPTR CAPT SELECTED THE HDG MODE, AND AS THE AUTOPLT COMMENCED THE TURN IT OVERBANKED PAST 30 DEGS AND THE STICK SHAKER SOUNDED WARNING OF IMPENDING STALL. RPTR APPLIED MAX PWR AND TOOK CTL OF ACFT. ACFT WAS 7 KTS ABOVE MINIMUM SPD FOR FLAPS.
Narrative: ON APCH TO MCI WE WERE ASSIGNED HDG 010 DEGS, 4000 FT, AND 190 KTS. THE AUTOPLT WAS IN USE IN HDG MODE AND ALT ARMED. IN THE TURN TO 010 DEGS THE AUTOPLT EXCEEDED 30 DEGS BANK AND STICK SHAKER WENT OFF. MAX PWR WAS APPLIED AND POSITIVE CTL OF ACFT WAS TAKEN. AT OUR WT 183 KTS WAS FLAPS 2 MINIMUM. WE WERE AT FLAPS 2 190 KTS WHEN SHAKER WENT OFF. AUTOPLT WAS WRITTEN UP AND THE ROLL CTL IN HDG MODE WAS DEEMED INOP IN MCI.
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.