What was found
APU HOLD OPEN FITTING IS CRACKED ON 1187 BULKHEAD / REMOVED ATTACHMENT FASTENERS FROM APU COMPARTMENT AFT INSULATION PANEL LOWER ROW; AND THE SUPPORT RING DISPLACED LOWER EDGE OF BLANKET IAW AMM 49-17-11 STEP 2F (7E;H). REMOVED HOLD OPEN FITTING FROM 1187 BULKHEAD. POSITIONED AND INSTALLED NEW HOLD OPEN FITTING IAW DWG: 148A2690; SRM 51-40-02-0G-0. POSITIONED LOWER EDGE OF AFT INSULATION PANEL AND INSTALLED THE LOWER ROW ATTACHMENT FASTENERS AND SUPPORT RING FASTENERS IAW AMM 49-14-11 STEP 3G (1DA) BONDING JUMPER RESISTANCE AT ATTACHMENT POINT ON THE SUPPORT RING FOUND IN LIMITS IAW AMM 49-81-11 STEP 3G(1(R)S)