What was found
DURING HEAVY MAINTENANCE, B6 CHECK AT (SAL), A CRACK (LENGTH: 2.627 INCHES) WAS FOUND ON LT WING REAR LOWER SKIN (P/N 190-33065-013) AT RIB 10+1". SEE THE REF /1/ EA FOR MORE DETAILS. THE DAMAGE IS FOUND TO BE OUTSIDE OF REF /3/ SRM LIMITS. THEREFORE, CONTACTED FOR REPAIR DISPOSITION. PROVIDED THE REF /2/ ETD WHICH PROVIDES INSTRUCTIONS TO CUT OUT THE CRACKS, PERFORM NDT INSPECTIONS AND INSTALL 1 REPAIR DOUBLER. THE REF /2/ ETD IS A TIME LIMITED REPAIR REQUIRING A DETAILED STRUCTURAL ANALYSIS WITH 12 MONTHS. THIS EC E18-733-01 PROVIDES THE TIME LIMITED REPAIR INSTRUCTIONS PER THE REF /2/ ETD & REF /1/ EA WITHOUT DEVIATIONS. EC E18-733-02 PROVIDES A PLACEHOLDER TO TRACK THE FOLLOW UP ANALYSIS REQUIRED WITHIN 12 MONTHS; THIS TIME LIMITED REPAIR, REQUIRING FURTHER ANALYSIS WITHIN 12 MONTHS, HAS BEEN APPROVED VIA REF /2/ ETD WITH ANAC FORM AND IS CLASSIFIED AS MAJOR.