What was found
THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH THE ON CONDITION REPLACEMENT OF A DAMAGED OR PREVIOUSLY REPAIRED LH FLOOR BEAM P/N 170-65669-003 (Y = -273) BETWEEN FRAMES 86 AND 89. THE DAMAGED STRUCTURE WILL BE REPLACED BY USING PRODUCTION DRAWINGS. BECAUSE THE TRACK IS A PSE, ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED AS A MAJOR REPAIR. REV. 1: ADDS AIRCRAFT S/N 17000218 THRU 17000224 TO THE EFFECTIVITY. REV. 2: ADDS AIRCRAFT S/N 17000225 THRU 17000234 TO THE EFFECTIVITY. REV. 3: ADDS AIRCRAFT S/N 17000235 THRU 17000264 TO THE EFFECTIVITY. REV. 4: ADDS STEP #23 FOR SUBMITTAL OF SDR.