As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING SCHEDULED MAINTENANCE INSPECTION, CRACKS WERE FOUND IN THE AFT EDGE OF THE NR 4, 5 AND 6 WING L/E RIBS ON BOTH THE TOP AND BOTTOM SURFACES WHERE THE RIB IS ATTACHED WITH A RIVET TO THE FWD SPAR ON BOTH THE LT AND RT WINGS. MFG HAS ISSUED A NO TECHNICAL OBJECTION LETTER DO-003/16 TO OPERATE THIS ACFT FOR 50HRS UNTIL PARTS ARE AVAILABLE.