…3AS continued to fly, and maintenance workers continued to grease the jackscrew every eight months. However, the plane ran into a streak of at least two or three grease applications that were not done correctly, including one in September 1999 by a notorious San Francisco-based mechanic who was later found to have applied virtually no grease to any of the jackscrews he worked on. The longer it went without being greased properly, the faster the jackscrew wore down the threads o…
