spinning r44
I don't wish to make specific reference to this accident only say that on my last r44 100hry the tail rotor pitch control bearing was rather dodgy, hours and maintenance are all 100% on this machine and Frank has an AD on this bearing replaced with a new type. But the degree of roughness in it was alarming and had developed in 287 hrs being the time since last 300 hrly,check. If this bearing seized I would imagine a certain amount of spinning would ensue. Condolence to the families