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BE36 pilot experiences electric elevator trim failure during climbout with the autopilot engaged; annunciated by autopilot and trim warning lights. Once the autopilot is turned off manual pitch trim functions normally and the flight returns to the departure airport.
| Attributes | |
| ACN | 1166997 |
| Time | |
| Date | 201404 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Bonanza 36 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Climb |
| Route In Use | Direct |
| Flight Plan | None |
| Component | |
| Aircraft Component | Elevator Trim System |
| Person 1 | |
| Function | Pilot Flying Single Pilot |
| Qualification | Flight Crew Multiengine Flight Crew Commercial Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 1.5 Flight Crew Total 2100 Flight Crew Type 900 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
On climbout; the annunciator lights on my king autopilot and annunciator panel lit up; announcing an autopilot failure and pitch trim (electrical) failure. Cycling the circuit breakers did not correct this issue. I briefly noted that due to the pitch trim failure; and despite pulling the circuit breakers; the pitch trim was frozen and not moveable. I quickly depressed the autopilot disconnect button on the yoke; and this returned manual operation of the pitch trim wheel; although I needed to repeat this action several times. I promptly notified departure (I was on VFR flight following at the time) of my problem and of my intent to return immediately. I did not declare an emergency; but I was greeted by emergency equipment (i.e. Fire truck) upon my safe and uneventful landing.
Original NASA ASRS Text
Title: BE36 pilot experiences electric elevator trim failure during climbout with the autopilot engaged; annunciated by autopilot and trim warning lights. Once the autopilot is turned off manual pitch trim functions normally and the flight returns to the departure airport.
Narrative: On climbout; the annunciator lights on my King autopilot and annunciator panel lit up; announcing an autopilot failure and pitch trim (electrical) failure. Cycling the circuit breakers did not correct this issue. I briefly noted that due to the pitch trim failure; and despite pulling the circuit breakers; the pitch trim was frozen and not moveable. I quickly depressed the autopilot disconnect button on the yoke; and this returned manual operation of the pitch trim wheel; although I needed to repeat this action several times. I promptly notified Departure (I was on VFR Flight Following at the time) of my problem and of my intent to return immediately. I did not declare an emergency; but I was greeted by Emergency equipment (i.e. fire truck) upon my safe and uneventful landing.
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.