| 31. | Check the jackscrew and nut for wear;
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| 32. | Check the general condition of the jackscrew assembly
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| 33. | The order followed by a day a recommendation from Boeing that carriers inspect the jackscrews.
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| 34. | American inspects the jackscrew and related parts about every 100 days, the company said.
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| 35. | The federal agency also gave airlines 30 days to measure wear in the jackscrew assembly.
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| 36. | The jackscrews were replaced in a number of planes after the inspections, Dorr said.
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| 37. | Four jackscrews replaced, others being evaluated.
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| 38. | _Continental Airlines, 69 planes : One plane had grit in the jackscrew grease.
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| 39. | And American recorded the wear rates of its jackscrews, something that was not required.
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| 40. | A plugged grease fitting may have prevented grease from getting on the jackscrew during lubrication.
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