What was found
SCRIBE MARKS ON TOP OF FUSELAGE AT FS 409.0+64 TO FS 409.0+80 STR L0+2 TO STR L1 ***AIRCRAFT REMOVED FROM SERVICE*** REMOVED SCRIBE MARKS ON TOP OF FUSELAGE AT FS 409.0+64 TO FS 409.0+80 STR R1 TO STR L1. WHERE ORIGINAL MATERIAL IS 0.058" THE LOWEST REMAINING THICKNESS IS 0.045, WHERE THE ORIGINAL MATERIAL IS 0.45" THE LOWEST REMAINING THICKNESS IS 0.042". ALL BLENDED AREAS WITHIN LIMITS IAW ASAP A# AWAC-CRJ253-01603 REV IR DATED 4/15/2021.