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A line aircraft maintenance technician (amt) reports a flight crew had noticed a binding; bump feel in both yoke controls when pulling the yoke rearward during their preflight on a cessna ce-750 aircraft. Troubleshooting later revealed an incorrect cable retaining bolt had been installed on the elevator aft sector that would contact the elevator feel pushrod when the elevator yoke was moved to a nose-up position.
| Attributes | |
| ACN | 1268868 |
| Time | |
| Date | 201506 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | Citation X (C750) |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Elevator ControlSystem |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Experience | Maintenance Inspector 10 Maintenance Technician 30 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy Deviation - Procedural FAR |
Narrative:
The flight crew reported a noticeable binding/bump in both yoke controls when pulling the control rearward. Mechanic Y and I began troubleshooting. We first pulled the pitch disconnect to split the pilot's and co-pilot's elevator systems. The problem was clearly in the co-pilot's elevator. We found the cable retaining bolt on the aft elevator sector contacting the elevator feel pushrod. The bolt was too long; causing damage to the pushrod and impeding elevator travel when the elevator was moved upward to nose up position. The damaged pushrod and incorrect hardware were replaced. Clearance and operational checks performed.the aircraft just came out of inspection; attention to detail in the flight control checks should have found this. The ce-750 flight controls feel is all artificial by spring bungees and it is difficult to physically feel the difference between a smoothly operating cable run and one that is obstructed.
Original NASA ASRS Text
Title: A Line Aircraft Maintenance Technician (AMT) reports a flight crew had noticed a binding; bump feel in both yoke controls when pulling the yoke rearward during their preflight on a Cessna CE-750 aircraft. Troubleshooting later revealed an incorrect cable retaining bolt had been installed on the elevator aft sector that would contact the elevator feel pushrod when the elevator yoke was moved to a nose-up position.
Narrative: The flight crew reported a noticeable binding/bump in both yoke controls when pulling the control rearward. Mechanic Y and I began troubleshooting. We first pulled the pitch disconnect to split the pilot's and co-pilot's elevator systems. The problem was clearly in the co-pilot's elevator. We found the cable retaining bolt on the aft elevator sector contacting the elevator feel pushrod. The bolt was too long; causing damage to the pushrod and impeding elevator travel when the elevator was moved upward to nose up position. The damaged pushrod and incorrect hardware were replaced. Clearance and operational checks performed.The aircraft just came out of inspection; attention to detail in the flight control checks should have found this. The CE-750 flight controls feel is all artificial by spring bungees and it is difficult to physically feel the difference between a smoothly operating cable run and one that is obstructed.
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.