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ATR72 flight crew reports rejecting a takeoff at 100 knots due to engine torque exceeding the planned limit of 90%.
| Attributes | |
| ACN | 944294 |
| Time | |
| Date | 201104 |
| Aircraft 1 | |
| Make Model Name | ATR 72 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Commercial |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Aborted high speed for torque exceeding the limitation; as per aom volume 1; on the #1 engine. Braking input was normal. Expected torque value (and also high end limiting torque value for a normal takeoff on our chart) was 90%. I noted the torque value increasing through 94.5 when I called the abort at approaching 100 knots. Maintenance was notified and when they met the aircraft they told us that this was 'within their limitations' and they indicated no problem with the aircraft. They gave us every indication that this aircraft was going to return to service. We later spoke with maintenance control via phone and they had ground run the aircraft and found a 96% torque on the the run for takeoff. I am reporting this event because we had a high speed abort for an engine limitation problem and then maintenance checked it good because they have different numbers. Knowing the safety data on high speed aborts; I feel it behooves the company to review the limitations for both maintenance and line pilots so we can do something to avoid scaring the passengers and causing any more statistics to this 'high speed abort' grouping.
Original NASA ASRS Text
Title: ATR72 Flight Crew reports rejecting a takeoff at 100 knots due to engine torque exceeding the planned limit of 90%.
Narrative: Aborted high speed for torque exceeding the limitation; as per AOM Volume 1; on the #1 engine. Braking input was normal. Expected torque value (and also high end limiting torque value for a normal takeoff on our chart) was 90%. I noted the torque value increasing through 94.5 when I called the abort at approaching 100 knots. Maintenance was notified and when they met the aircraft they told us that this was 'within their limitations' and they indicated no problem with the aircraft. They gave us every indication that this aircraft was going to return to service. We later spoke with Maintenance Control via phone and they had ground run the aircraft and found a 96% torque on the the run for takeoff. I am reporting this event because we had a high speed abort for an engine limitation problem and then maintenance checked it good because they have different numbers. Knowing the safety data on high speed aborts; I feel it behooves the company to review the limitations for both maintenance and line pilots so we can do something to avoid scaring the passengers and causing any more statistics to this 'high speed abort' grouping.
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.