What was found
DURING IMBV, THE LEFT OMEGA BEAM AT FRAME 20 WAS FOUND CORRODED. REMOVED PREVIOUS REPAIR AND RETAINED 2 SHIMS AND 1 PLATE. TRIMMED P/N EPNEM53EP54701 TO 18.5 INCH FOR A DOUBLER AND EPNEM53EP54703 TO 12.5 INCH FOR A FILLER. CLEANED, ALODINED, PRIMED AND INSTALLED REPAIR PARTS IAW EMB SRM 53-00-10. AIRCRAFT RETURNED TO SERVICE.