What was found
DURING ROUTINE OPERATIONS IN SMF. MAINTENANCE DISCOVERED A CRACK IN THE LEFT-HAND STA 952.65 UNDERWING FAIRING SKIN. THE SKIN IS MADE FROM 2024-T3 X 0.050” AND CLASSIFIED AS A PRIMARY STRUCTURE. A 22” DETAILED VISUAL INSPECTION (DVI) OF THE SURROUNDING STRUCTURE IDENTIFIED NO ADDITIONAL DAMAGE. IN ACCORDANCE WITH ATI ENGINEERING ORDER 53-767-7599 REVISION IR, DATED FEBRUARY 21, 2021, A 4 INCH CRACK UNDER WING FAIRING SKIN (PIN 149T7401-123) AT STATION 952.65 WAS REPAIRED. THE CORRECTIVE ACTION IDENTIFIED WITHIN THE REPAIR ORDER CONSTITUTES A MAJOR ALTERATION CATEGORY A. THE INSPECTIONS GIVEN IN THE BASELINE ZONAL INSPECTION ARE SUFFICIENT FOR CONTINUED AIRWORTHINESS. AIRCRAFT RELEASED TO SERVICE.