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A CE680 captain reported rejecting a takeoff for an uncommanded nose up elevator trim after 80 KTS on the takeoff roll.
| Attributes | |
| ACN | 978132 |
| Time | |
| Date | 201111 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Cessna Citation Sovereign (C680) |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Horizontal Stabilizer Control |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
I initiated takeoff from runway 27R. Power was set for takeoff and the appropriate callouts made. After the 80 KT call was made by the pilot not flying; I saw a red annunciator and master warning appear out of the corner of my eye. The pilot not flying stated 'abort; abort; abort'. I aborted the takeoff and noted during deceleration that the trim was running nose up with no input from me or the pilot not flying. It turns out the annunciator I saw illuminate was the standby annunciator for 'stab trim not in range'. The trim had been set at 3.4 for takeoff. It had moved uncommanded to 5.9 during the takeoff roll. We told tower we needed to return to the ramp and to cancel our flight plan. Find out why this type of event is occurring on the sovereigns. It is not the first; also; brief sovereign pilots that this is occurring in the fleet.
Original NASA ASRS Text
Title: A CE680 Captain reported rejecting a takeoff for an uncommanded nose up elevator trim after 80 KTS on the takeoff roll.
Narrative: I initiated takeoff from Runway 27R. Power was set for takeoff and the appropriate callouts made. After the 80 KT call was made by the pilot not flying; I saw a red annunciator and Master Warning appear out of the corner of my eye. The pilot not flying stated 'Abort; Abort; Abort'. I aborted the takeoff and noted during deceleration that the trim was running nose up with no input from me or the pilot not flying. It turns out the annunciator I saw illuminate was the standby annunciator for 'stab trim not in range'. The trim had been set at 3.4 for takeoff. It had moved uncommanded to 5.9 during the takeoff roll. We told Tower we needed to return to the ramp and to cancel our flight plan. Find out why this type of event is occurring on the Sovereigns. It is not the first; also; brief Sovereign pilots that this is occurring in the fleet.
Data retrieved from NASA's ASRS site as of April 2012 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.