What was found
NRC 2000-0049: 031-11 AFT PASSENGER CABIN FLOOR STRUCTURE, CORROSION FOUND AT RH THRESHOLD BEAM LOWER MAIN SILL AREA BTW FRAME 66-68. / AFT PASSENGER CABIN FLOOR STRUCTURE LOWER MAIN SILL AREA BTW FRAME 66-68, PERMANENTLY REPAIRED PERFORMED AT THRESHOLD BEAM IAW SRM 53-41-14-300-001 SHEET 3 PRINCIPLE 5. REPAIRED CATEGORY A, NO FURTHER ACTION REQUIRED. SEE AWS FOR DETAILS AND NDT REPORT MWO: 48857-7. EXTRUSION: P/N: AND10136-2004 7075T6, P/O: 1559749. FILLER: P/N: 7075T6 .063"", P/O: 1694322. HI-LOCK: HL11VF6-3, P/O: 1658950. HI-LOCK: P/N: HL10VF6-5, P/O: 1717789. HI-LOCK: P/N: HL10VF6-4, P/O: 1727233. HI-LOCK: P/N: HL10VF6-3, P/O: 1569232. COLLAR: P/N: HL70-6, P/O: 1707708. PRC: P/N: PRC870B2 #655, P/O: 1724389."