What was found
AFTER FURTHER EVALUATION FOUND CORROSION ON THE PREVIOUS REPAIR AT THE VACUUM WASTE VENT STA 917 BTW STL 21 AND STL 22, REPAIR P ARTS NEED TO BE REPLACED (REF. AAR NR 99961011). WORK DONE IAW B737-800 SRM 53-70-01-2R-3.PERFORMED NDT AT EXIST A CATAGORY B REPAIR AND REQUIRES INSPECTION INTERVALS IAW B737 5 TER AIRCRAFT DELIVERY. REPEAT INSPECTIONS EVERY 5,000 CYCLES. ING HOLES IAW 737 NDT PART 6 51-00-00 PROCEDURE 16 BHEC.THIS IS 3-70-01-2R-3 TABLE 202. INSPECTION THRESHOLD IS 50,000 CYCLES AF (REF. LP 8490548)REMOVED,FABRICATED,AND INSTALLED REPAIR PART DO UBLER AND TRIPLER AT THE VACUUM WASTE STA 917STR 21L-STR 22L.ALL ADD EMP:V938331 V940429