EC-135P2 Compressors stall
I have an experience on 2/1/14 while taxying out, experienced a series of loud noise and shaking. Then it stop suddenly within spilt seconds. taxy back and examine the engine where the covers shows sign of back pressure bulged. Time 10.15am in WMSA, wind light and variable at 30 deg Celcius. Just refuelled full with addition of 215Kg Jet A1. Total load of 2673Kg hovering at 63% torque and 80% indicated power. All checks shows the EC-135 to be normal except for the mass moment was exceeded as the violent shaking could have induced an abnormal forces. Fuel before and after occurrence found to be normal. Would like to know what causes it and how to prevent it happening again. Taxying straight and level. 2 Pilots in front and one pax at rear. Please give any comments relevant to EC-135P2 experience.
Thanks
cwgoh