What was found
MULTIPLE CRACKS ON BACK OF APU ENCLOSURE. "AIRCRAFT REMOVED FROM SERVICE" CRACK #1 IS 1.62" IN LENGTH AND LOCATED 9" AFT OF FWD EDGE AND 8" I/B OF LWR O/B EDGE. CRACK #2 IS 1.60" IN LENGTH AND LOCATED 9" AFT OF LWR FWD EDGE AND 5" O/B OF LWR I/B EDGE. BOTH CRACKS ARE STOP DRILLED AND HFEC WITH NO FURTHER INDICATIONS. FABRICATED REPAIR DOUBLERS FROM 0.032" CRES 301 1/2 HARD STAINLESS STEEL. CRACK #1 DOUBLER DIMENSIONS ARE 6.7"L X 3.6"W AND CRACK #2 DOUBLER DIMENSIONS ARE 6.5"L X 3.5"W. BOTH CRACK DOUBLER REPAIR LOCATIONS WERE DRILLED AND INSTALLED REF AWAC SUPPLEMENT NO 15-200 DATE OF ISSUE 8/21/2015.