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B737 captain reported a large left yoke deflection on approach; which was possibly caused by 'spoiler float' on the right wing.
| Attributes | |
| ACN | 1516128 |
| Time | |
| Date | 201802 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Speedbrake/Spoiler |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Inflight Event / Encounter Unstabilized Approach |
Narrative:
I ferried the aircraft to pick up a load of passengers. I was warned by the previous flight's pilot in command that there was a yoke deflection on approach when the flaps are moved from 15 to 30 degrees for landing. On approach; I hand flew the airplane due to the short vectoring. However; due to high crosswinds and my use of cross control of the airplane; I did not notice a yoke displacement. On the return leg during approach; I noticed a large deflection of the yoke to the left; of at least 15 degrees with the autopilot a engaged and the airplane in a landing configuration. I switched to autopilot B and the condition stayed the same. I then hand flew the aircraft with the same deflection in light winds down the runway to a normal landing. I landed without incident and entered the discrepancy in the logbook. At the last minute; I believed I had spoiler float on the right wing.
Original NASA ASRS Text
Title: B737 Captain reported a large left yoke deflection on approach; which was possibly caused by 'spoiler float' on the right wing.
Narrative: I ferried the aircraft to pick up a load of passengers. I was warned by the previous flight's Pilot in command that there was a yoke deflection on approach when the flaps are moved from 15 to 30 degrees for landing. On approach; I hand flew the airplane due to the short vectoring. However; due to high crosswinds and my use of cross control of the airplane; I did not notice a yoke displacement. On the return leg during approach; I noticed a large deflection of the yoke to the left; of at least 15 degrees with the autopilot A engaged and the airplane in a landing configuration. I switched to autopilot B and the condition stayed the same. I then hand flew the aircraft with the same deflection in light winds down the runway to a normal landing. I landed without incident and entered the discrepancy in the logbook. At the last minute; I believed I had spoiler float on the right wing.
Data retrieved from NASA's ASRS site 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.