TO DATE, INVESTIGATION ACTIVITY HAS CONSISTED OF (1) A JOINT SITE VISIT BY REPRESENTATIVES OF ODI, PACCAR, REDWOOD RELIANCE TRAILER, AND PREMIER MFG CONDUCTED FROM MAY 5 - 8, 2008; (2) FIELD STRAIN GAGE WORK CONDUCTED BY PREMIER MFG; AND (3) INSPECTION OF RETURNED PINS (PINS REMOVED FROM SERVICE AND REPLACED THROUGH CAMPAIGN ACTION) CONDUCTED BY PACCAR.ODI IS UPGRADING THIS INVESTIGATION TO EA08-019 TO ALLOW SUFFICIENT TIME TO APPROPRIATELY ANALYZE AND REVIEW THE DATA COLLECTED.