LPR Lublin EC 135 P2+ Incident: TQ Exceedances During HEMS Flight (SP-HXC)

Incident Overview and Flight Details On 9 March 2017, the crew of the Lublin branch of the Polish Air Rescue Service (LPR) conducted a HEMS flight to Tarnawka in an EC 135 P2+ helicopter. The mission was carried out and completed without operational consequences. The event was recorded by the State Commission for Investigation of Aviation Accidents (PAŃSTWOWA KOMISJA BADANIA WYPADKÓW LOTNICZYCH) under incident number 389/17 and classified as an incident. ## Post-Flight Findings Following the flight, the crew reviewed records from the UMS/PGS system, which logs exceedances. The review identified torque (TQ) exceedances on both engines during the flight. On the left engine, designated as number 1, the maximum TQ reached 70.2% for 10.75 seconds. On the right engine, designated as number 2, the TQ reached 70.8% for 10.75 seconds. The crew did not observe these exceedances during the operation. ## Maintenance Actions In accordance with MSM 05-51-00, 6-8, the identified exceedances required Category B maintenance within the next five hours of helicopter operation. The required tasks included washing the main gearbox oil filter, inspecting the main and final gearbox chip detectors, and inspecting the main rotor hub. All tasks were completed within the prescribed time, and the helicopter was found to be serviceable. ## Probable Cause and Follow-Up The probable cause of the incident was identified as improper distribution of attention during the final phase of the helicopter's acceleration. The event was discussed with all LPR operational personnel as a preventive measure. The Commission did not formulate safety recommendations.