| 41. | Northwest Airlines, 172 planes, one with grit in the grease, jackscrew replaced.
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| 42. | Airborne Express, 75 planes, two jackscrews found to lack lubricant, both lubed.
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| 43. | Continental Airlines, 69 planes, one with grit in jackscrew grease, jackscrew replaced.
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| 44. | Continental Airlines, 69 planes, one with grit in jackscrew grease, jackscrew replaced.
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| 45. | Hawaiian Airlines, 15 planes, two with shavings in grease, both jackscrews replaced.
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| 46. | A sample jackscrew was prominently displayed in the entrance hallway outside the NTSB public boardroom.
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| 47. | Threads on the recovered jackscrew were stripped.
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| 48. | The jackscrew, part of the horizontal stabilizer, is suspected of causing the crash.
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| 49. | Crash investigators later concluded the jackscrew mechanism on the jetliner had jammed soon after takeoff.
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| 50. | More than half of these were directly related to jackscrew lubrication and end play measurement.
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