What was found
WHILE IN HEAVY CHECK CORROSION WAS FOUND ON THE AFT CARGO DOOR AFT FRAME, FRAME 80, STRINGER 27R. REMOVED AND REPLACED THE AFT CARGO DOOR FRAME IAW SRM 51-41-01, SRM 51-41-02, SRM 51-41-02, SRM 51-43-03, SRM 51-43-04, AND ETD2017-170-049860.