Iw18066711 wrote:if the defective situation is unknown , lower efficiency is acceptable and safe. But if the defective situation is noticed , lower efficiency unacceptable and unsafe, and the airplane must fly with restriction according MEL. Is there no contradiction in this?
Not at all. That’s why we have scheduled maintenance that digs a little deeper into the systems.
Question: how many cracks are there in the wing or fuselage of any given aircraft? None? One, two, five, more? Once identified, usually during a scheduled maintenance check, the crack(s) is repaired or continued as allowed.
Once a discrepancy is identified, it must be addressed.
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