Airplane Has Counterfeit Parts / Bad Vibrations on Partnair Flight 394
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The Vertical Stabilizer Is Not Airworthy
The wings failed symmetrically under g load while the aircraft was still at high altitude. Sheets of honeycomb from the shroud doors between the fin and the rudder were released and fell slowly into the water. The vertical stabilizer was attached to the fuselage with pins and sleeves, which did not comply with the specified values for hardness and tensile strength. It turns out that they had used counterfeit parts when they performed this repair.
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