Central bearing problem - azimuth errors potentially 15" at the horizon

• Location of bumps.
• 1997 Feb - Discovery (rpt).
• 1998 Apr - Update (rpt).
• 1998 May - Dial Gauge measurements (ip).
• 1998 July - Update (rpt).
• 1999 Jan 28 - Update (rpt).
• Amplitude as a function of time
• Plan to fix the problem (by IP)
• Images of new bearing during manufacture and inspection
• 1999 May 08 - REPLACED !!! (see report by IP ).
• 1999 Aug 23 - Inspection in Detroit ( report & pictures by IP)
• 1999 Sep 10 - Implication of PARK position in c.b. damage (by IP)

• 2004 May 08 - Recurrence - amplitude at horizon ~ 6" peak-to-peak.
• 2004 Dec 20 - Monitored - amplitude unchanged
• 2005 Jul 29 - Monitored - amplitude unchanged