What was found
WHILE WORKING MDDR 256255, FWD CARGO STA 500 LATERAL GUIDE AND ENDSTOP FWD - 4 EA BROKEN, NOTICED UNDERLYING STRUCTURE DAMAGED, INCLUDING SEAT TRACK, WEB, & LOWER INTERCOSTAL AT ALL 4 POSITIONS. LBL 45.5, LBL 24.75, RBL 24.75, & RBL 45.5 AT BS 480 IN THE FWD CARGO BAY. ALL REPAIRS ACCOMPLISHED PER SRM 51-70-13-2R-3 & EA 4853A326 TALLY 8021 REF NR 74, 75, 76, 77 & W/O 161554. NO FURTHER DEFECTS NOTED. NR 74 REMOVED WEB FROM LBL 45.5 THRU 24.75, & LWR INTERCOSTAL & LWR CARGO RESTRAINT SYS. LOCATED, CLEANED, PREPARED, DRILLED & FABRICATED NEW WEB IAW SAMPLE, FABRICATED TRACK & CARGO ANGLES IAW SAMPLE. PREP & PRIMER, SECURED & ASSEMBLED AT FWD CARGO BAY BS 480, LBL 45.5 IAW SRM 53-00-53-2R-1 REPAIR 1 & EA 4853A326, REV 0, PART 1, TIME LIMITED REPAIR. REPAIRED WEB OTBD OF LBL 45.5 IAW SRM 51-70-13-2R-3 REPAIR 3. PERF NDT HFEC INSP IAW NDTM PART 6 51-00-00. NR 75 & 76, REMOVED DAMAGED SECTION OF CARGO TRACK BS 460 - 490, LBL & RBL 24.75. REPAIRED WEB INBD OF RBL & LBL 24.75 IAW SRM 51-70-13-2R-3, REPAIR 3. FABRICATED, COATED, DRILLED, TREATED, & PRIMED NEW CARGO TRACK, COATED & INSTALLED NEW TRACK IAW SRM 53-00-53-2R-1, REPAIR 1. PERF NDT MFEC INSP ON CRACK, FOUND NO FAULTS IAW NDTM PART 6 51-00-00. NR 77, REMOVED DAMAGED CARGO TRACK BS 460 - 490, RBL 45.5. REPAIRED WEB OTBD OF RBL 45.5 IAW SRM 51-70-13-2R-3, REPAIR 3. FABRICATED, LOCATED, DRILLED, TREATED & PAINTED CARGO TRACK. COATED & INSTALLED NEW TRACK IAW SRM 53-0053-2R-1, REPAIR 1 & EA 4853A326, REV 0. PERF NDT HFEC INSP IAW NDTM PART 6 51-00-00. R & R LATERAL GUIDES (4) IAW AMM 25-53-25-000-801. OPS CHKD OK.