| 1. | _Airborne Express, 75 planes : Two jackscrews needing lubrication.
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| 2. | _American Airlines, 284 planes : One jackscrew lacked lubricant.
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| 3. | Airlines replaced jackscrew devices in the tail sections of 18 aircraft.
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| 4. | Crash investigators later concluded the jackscrew mechanism jammed soon after takeoff.
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| 5. | Flight 261's jackscrew was found, damaged, on Wednesday.
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| 6. | Airlines had reported finding jackscrew problems in 22 planes by midday Sunday.
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| 7. | The airlines said they wanted to check a component called a jackscrew.
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| 8. | Carriers should check the jackscrew assemblies at their convenience, Boeing said.
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| 9. | Spokespeople for Northwest and Delta Air Lines also reported residue on jackscrews.
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| 10. | TWA, 131 planes, one with metal shavings, jackscrew replaced.
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