Question about Skymaster landing gear system

[Kim Geyer]

I’m calling BS on the cause of the collapse. Hydraulic pressure will and does hold the down lock hooks over center but they are also spring loaded and once they snap into place it is almost impossible for it to unlock. 337b is correct about the actuator having a internal lock but later model 337’s didn’t have that actuator. I’ve resealed and rigged both types of actuators this year. I have seen the hooks get dirty and sticky with hyd fluid and not lock well but you will get a warning horn.