AS355 F2 tail rotor servo problems

[haihio]

Dear fellow rotorwing aviators,

I would like to know if any of you that have or have had experience operating the 355 F2 have experienced the same problems we are facing with one of ours:
basically we get stuck left pedal. I can apply right pedal no problem but I can only go forward a couple of centimeters on the left and then it gets stuck, if I push harder I can give full left pedal but that is without hydraulic assistance.

We have tried various options like swapping the tail servo from another serviceable 355, or doing some tests with the accumulator but still we can’t get it to work, we have also contacted airbus but they also haven’t been able to give us a definite answer.

Any useful info is appreciated.

Always fly safe !

[HeliAl]

Try swopping out your ACCU switch, it might have gone open circuit.

[haihio]

Hi helial. I’ll suggest this to the maintenance team. Thanks

[Gordy]

I had this problem o a B2 once...check the TR cable, it may have frayed and the metal cable will resist on the plastic/rubber sheath. (Not up on the technical terms these days).

[GrayHorizonsHeli]

Ive seen the load compensator installed incorrectly and it hangs up on the tailboom frame.

[haihio]

Thanks for your feedback, it’s very appreciated.

[PEASACAKE]

Originally Posted by GrayHorizonsHeli

Ive seen the load compensator installed incorrectly and it hangs up on the tailboom frame.

We also had the same problem, incorrectly installed compensator. Found on the engineering ground run when releasing pressure in accumulator after shutdown (1990).

This was after replacing a tailboom.