What was found
DURING A-CHECK BEING PERFORMED, MX FOUND DAMAGE TO THE LOWER AFT CARGO COMPARTMENT - BS1820 - BS1840, BL 0 CONSISTING IN: "Z" SECTION FROM BS 1820 TO BS 1840, RBL3.0 IS 0.050" 7075-T6. REPAIRED IAW SRM 51-40-03 FIG 1 REF FIG 1. TOP PANEL FROM BS 1820 TO BS 1840 IS 0.050" 7075-T6 PN 65B06486-6. FABRICATED NEW IAW SAMPLE SAME MATERIAL AND THICKNESS (REF FIG 2) VERTICAL STIFFENER AT BS 1820, LBL4.0 M/F 7075-T6. FABRICATED NEW IAW SAMPLE FROM EXTRUDED SECTION PN AND10141-1401, 7075-T6 REF FIG 3. ANGLE BS1840 ON RBL3.0. FABRICATED/FORMED IAW SAMPLE FROM 7075-TO AND HEAT TREATED TO 7075-T6 (REF FIG 4) IAW SRM 51-20-01 (REF FIG 4). ATTACH ANGLES, 2 EA (PN 69B02277-3) AT BS 1820, LBL3.0 & RBL3.0 (M/F 0.050" 7075-T6). FABRICATED/FORMED BOTH IAW SRM 51-20-01 (REF FIG 5). GUSSET AT BS 1822, RBL3.0 (M/F 0.040" 7075-T6). FABRICATED IAW SAMPLE FROM 0.040" 7075-T6 SHEET IAW SRM 51-20-01 (REF FIG 6) "L" ANGLE AT BS 1822, RBL 3.0 (M/F 0.040" 7075-T6). FABRICATED IAW SAMPLE FROM FORMED FROM 0.040" 7075-T6 SHEET IAW SRM 51-20-01 (REF. FIG 7).