What was found
LAV SERVICE PORT INTERNAL DOUBLER HAS CORROSION ON AFT SIDE. BLENDED CORROSION IAW SRM 52-42-10, REPAIR -01. DAMAGE DEPTH IS .043" AS MEASURED. DAMAGE IS NOT WITHIN SPECS LISTED IN REPAIR SCHEME B, 2 OF 1400, SRM 52-42-10, REPAIR 01. REMOVED INTERNAL DOUBLER, RIVETS REMOVED FROM EXTERNAL DOUBLER, PN:85307796 TO GAIN ACCESS TO INTERNAL DOUBLER, PN:85307789 IAW SRM 51-42-05. HINGE HALF REMOVED PN:85307797-001, REF SRM 51-42-05 STEP 4E. INSTALLED HINGE HALF TO LAV SERV DOOR OPENING REF SRM 51-42-05, REPAIR -01. EXTERNAL DOUBLER EPN:85307796-101, REF SRM 51-42-05, STEP 4E. INSTALLED EXT DOUBLER PN:85307796-101 TO LAV SERV DOOR CUT OUT REF Q400 SRM 51-42-05, REPAIR -01. INSTALLED INTERNAL DOUBLER, PN:85307789-101 TO LAV SERVICE DOOR CUTOUT REF SRM 51-42-05, REPAIR -01. LOCATED AND DRILLED NEW INTERNAL DOUBLER PN:85307789-101 REF SRM 51-40-07, REPAIR 01 AND DWG 85307789, REV.-- DATED 96/11/19. APPLIED FILLET SEAL AROUND EXTERNAL DOUBLER PN:85307796-101, REF SRM 51-23-00.