What was found
DURING A 1000 HOUR AIRFRAME INSPECTION, THE MECHANIC FOUND A CRACK OF APPROXIMATELY 2.25 INCHES IN LENGTH ON THE RT FORWARD MAIN TRANSMISSION DECK AT THE TRANSITION TO THE CABIN ROOF ABOVE THE NR 4 BULKHEAD. THE CRACK IS LOCATED IN THE RADIUS OF THE DOUBLER THAT MAKES UP THE TRANSITION. REPAIRED IAW SRM 51-71-53, 8-7.