Question: Describe the term feathering as it pertains to propeller function and why it's important to be aware of this dynamic during an accident investigation such

  1. Describe the term "feathering" as it pertains to propeller function and why it's important to be aware of this dynamic during an accident investigation such as Zonk Air accident?
  2. What is meant by the general investigative expression, "Turbine parts may have a memory?" (Note: the word "memory" in this case does NOT refer to a human factors issue)
  3. What is meant by "critical flows" needed by a turbine engine to operate properly, and is there a cause-and-effect relationship in regards to these flows, and an accident involving turbine power plants?

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