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  • MCDONNELL-DOUGLAS SAFETY

  • Mc Donnell Douglas MD83 Loss of Control and Impact with Pacific

  • The US NTSB determined that the probable cause of this accident was a loss of airplane pitch control resulting from the in-flight failure of the horizontal stabilizer trim system jackscrew assembly?s acme nut threads. The thread failure was caused by excessive wear resulting from insufficient lubrication of the jackscrew assembly.
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