What was found
DURING CHECK-C MAINT, FOUND CRACK AT TOP OF SUPPORT DOUBLER ON FWD FACE OF REAR BULKHEAD, STA 1338 BELOW LONGERON 1. REMOVED AND REPLACED EXISTING SUPPORT DOUBLER WITH NEW TWA PN 63-9879. PART SECURED TO BULKHEAD WITH MS20470AD-S RIVETS PER SRM 51-30-2, AND HLT 425-6 PER SRM 51-30-5.