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Dash-8 captain reported rejecting takeoff when the number one engine torque began to drop. The flight returned to the gate for maintenance.
| Attributes | |
| ACN | 1421138 |
| Time | |
| Date | 201701 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
After being cleared for takeoff; during the initial phase of the takeoff roll; the first officer (pilot flying) called for takeoff power to be set. The ground range lights were called dark and the auto feather was called armed. At that point; there was an audible change in the sound of the number 1 engine followed by a yawing moment to the left. At 60 knots the takeoff was rejected and we taxied off the runway and ran the rejected takeoff checklist. The first officer stated he observed the torque on the number 1 engine decrease to 60% and continue to trend lower as he rejected the takeoff. Due to the very rapid rejection of the takeoff; I was unable to observe the remainder of the engine instruments. Once the aircraft was taxied off the runway; both engines appeared to operate normally with power settings between flight idle and disc. Additionally; bleed selector 1 and 2 were confirmed on. According to the flight attendant; there was a customer in the back who stated was a pilot; and that he heard 'something wrong' with the engine just prior to our rejecting the takeoff. We then returned to the gate; deplaned; and maintenance control was notified of the status of the aircraft.
Original NASA ASRS Text
Title: Dash-8 Captain reported rejecting takeoff when the number one engine torque began to drop. The flight returned to the gate for maintenance.
Narrative: After being cleared for takeoff; during the initial phase of the takeoff roll; the FO (pilot flying) called for takeoff power to be set. The ground range lights were called dark and the auto feather was called armed. At that point; there was an audible change in the sound of the number 1 engine followed by a yawing moment to the left. At 60 knots the takeoff was rejected and we taxied off the runway and ran the rejected takeoff checklist. The FO stated he observed the torque on the number 1 engine decrease to 60% and continue to trend lower as he rejected the takeoff. Due to the very rapid rejection of the takeoff; I was unable to observe the remainder of the engine instruments. Once the aircraft was taxied off the runway; both engines appeared to operate normally with power settings between flight idle and disc. Additionally; bleed selector 1 and 2 were confirmed on. According to the flight attendant; there was a customer in the back who stated was a pilot; and that he heard 'something wrong' with the engine just prior to our rejecting the takeoff. We then returned to the gate; deplaned; and maintenance control was notified of the status of the aircraft.
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.