TM 1-1520-238-232-492.14.CENTER FUSELAGE FRAME STRUCTUREHEAT TREAT TO CONDITION SHOWN AFTER FORMING.DO NOT INSTALL CONDITION O MATERIAL.123245525556M04-0008CAUTIONItem Material Specification ConditionThickness(inches)1Forging22024 AL ALYQQ-A-250/4T420.04032024 AL ALYQQ-A-250/4T420.05042024 AL ALYQQ-A-250/4T420.07152024 AL ALYQQ-A-250/4T420.03267075 AL ALYQQ-A-250/12T60.071