What was found
AFT CARGO COMPT LOWER FUSELAGE STR 29L IS CORRODED BETWEEN STA 970 AND STA 990. REMOVED STR 29L KEEL BEAM CHORD FROM BS 950-1010 DRILLED AND LOCATED NEW KEEL BEAM CHORD P/N 65-56441-7 PO NR 53143 IAW S/B 727-53-179 FIG 12 TREATED AND PRIMED AREA AND CHORD IAW B727 SRM 51-10-2 INSTALLED AND TORQUED BOLTS AT BS 950A STR 29L - BS 1010 (TORQUED AS REQUIRED) IAW S/B 727-53-179 DATED JULY 13, 1989 FIG 12 AND SRM 51-30-4 FIG 2.