CAN/EXT.UTPA) FOR CRACKS IN THE FUSELAGE SKIN AT THE CHEM-MILLED STEPS AT SPECIFIED LOCATIONS (FOR AIRPLANES WITHOUT THE PREVENTATIVE MODIFICATION. TIME-LIMITED REPAIR OR PERMANENT REPAIR INSTALLED IN ACCORDANCE WITH THIS SB) MOS 7-Insufficient Information +-Task exists in Inspection Manual (s)-Suppressed Requirement (ex)-Excluded Tasks '-Est