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The real magic of the downlock system is on the opposite end of jam-nut rod. It is an internal mechanical lock with checkballs and a spring. Only hydraulic pressure can unlock it. You have to disassemble the entire actuator to see it. If those internal checkballs aren’t locked it is possible that enough force could overcome the hook mechanism.
The nose gear is held down by three separate mechanisms.
1. Internal checkball system
2. Over center hook
3. Hydraulic pressure of the actuator
If any one or two doesn’t do it’s job it’s possible it could collapse.
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Hybrid Mode
