Incident Overview
On 11 June 2019, a Bombardier Q400 (DHC8-402) was conducting a takeoff from Warsaw Chopin Airport (EPWA). After setting takeoff power, the crew observed that engine number 2 indicated only 63% torque (TRQ). The crew confirmed that the engine control lever was in the correct position and decided to reject the takeoff. The aircraft was subsequently handed over to maintenance personnel.
Maintenance Findings
During the technical inspection, a malfunction of the fuel metering unit (FMU) was detected. The maintenance department ordered the replacement of the FMU, as well as the fuel flow divider (FFD) and the fuel flow transmitter along with its wiring harness. After replacement of these components, engine parameters returned to normal.
Cause
The cause of the incident was determined to be a malfunction of the fuel metering unit (FMU).
Actions Taken
No preventive actions or safety recommendations were formulated by the investigating entity or the commission.