LOWER B.S. 400-420 DAMAGE TOLERANCE ANALYSIS; SH. 1-31, REV. (IR) • - - NOTE: REQUIRED INSPECTIONS ATTAQBED . 20115 . THESE DATA APPLY ONLY TO BOERNIG 727-31 S/N . . . PURPOSE OF DATA . . TO APPROVE -DATA FOR DAMAGE TOLERANCE ANALYSIS, B-727-3I S/N 20115 , APPLICABLE REQUIREMENTS (Lis spec