What was found
EXISTING RT FUSELAGE SKIN EXTERNAL DOUBLER REPAIR AT BS 670, S-20R-S-21R, COMPLY WITH ATTACHMENT "B" OF EO F-5100-7-5001, PART 1. DURING EVALUATION OF ABOVE NOTED REPAIR PER ATTACHMENT "B" OF EO F-5100-7-5001, PART 1, IT WAS DISCOVERED THAT PREVIOUS REPAIR WAS NOT PER ANY APPROVED DATA. REMOVED EXISTING REPAIR AND INSTALLED A NEW DOUBLER REPAIR PER SRM 53-00-01, FIGURE 201, REPAIR NR 16. NEWLY INSTALLED DOUBLER REPAIR AT BS 670, S-20R - S-21R, EXTERNAL, IS CLASSIFIED AS A CATEGORY "B" MAJOR REPAIR WITH THE FOLLOWING REPETITIVE INSPECTION: INSPECTION THRESHOLD; 25,000 FC; REPEAT INTERVALS OF 3,000 FC (LFEC).