What was found
AIRCRAFT OUT OF SERVICE DUE TO C7 S2 CHECK. FWD CABIN FLOOR BEAM AT FR 20 RT, Y 1292 HAS LIGHT CORROSION. REMOVED CORROSION ON FLOOR BEAM AT FR 20 RT, Y 1292 IN FWD MAIN CABIN. ORIGINAL THICKNESS .079 INCHES, REMAINING THICKNESS .068 INCHES FOUND TO BE WITHIN LIMITS IAW SRM 53-11-14, FIG 105, SH 1 & SRM 51-74-00, PAR 6 B.