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A B757-200 captain reported a split elevator condition detected because of the unusual aileron trim; then verified by the pfd indications.
| Attributes | |
| ACN | 1052051 |
| Time | |
| Date | 201211 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Elevator |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy |
Narrative:
This report falls into a gray area from the flight operations manual requirement to report flight control malfunctions. We did not need to get into QRH. However; the elevators had a 'split elevator' condition. The left elevator indicated higher than the right (or vice versa). This required a higher than normal aileron trim (approximately 1.5 - 2 units) to achieve coordinated flight; referencing the slip/skid indicator. (Rarely; does the 757 require aileron trim; and I've never seen a 'split elevator' condition on the 757). Upon landing; we annotated the discrepancy in the logbook and sent pictures of the pfd taken from cruise flight to facilitate maintenance correcting the condition. These photos were forwarded to maintenance. It appears that the flight controls we're not rigged correctly and they were fighting each other. As well as burning more fuel than an aircraft properly rigged.
Original NASA ASRS Text
Title: A B757-200 Captain reported a split elevator condition detected because of the unusual aileron trim; then verified by the PFD indications.
Narrative: This report falls into a gray area from the Flight Operations Manual requirement to report flight control malfunctions. We did not need to get into QRH. However; the elevators had a 'split elevator' condition. The left elevator indicated higher than the right (or vice versa). This required a higher than normal aileron trim (approximately 1.5 - 2 units) to achieve coordinated flight; referencing the slip/skid indicator. (Rarely; does the 757 require aileron trim; and I've never seen a 'split elevator' condition on the 757). Upon landing; we annotated the discrepancy in the logbook and sent pictures of the PFD taken from cruise flight to facilitate Maintenance correcting the condition. These photos were forwarded to Maintenance. It appears that the flight controls we're not rigged correctly and they were fighting each other. As well as burning more fuel than an aircraft properly rigged.
Data retrieved from NASA's ASRS site as of July 2013 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.