American Airlines 191
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.03 to (+) .06. inch about the final rest value. A sink rate of about 1.25 ' ‘, - From March 29: through 31, 1979, the accident aircraft underwent the spherical bearing modification. On April 19, 1979, the forklift's maintenanceOpen official document at PDF page 33NTSB AAR-79/17: American Airlines DC-10-10 N110AA, Chicago