As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK. EXTENSIVE CRACKING WAS DISCOVERED ON THE 114W4160-8 SLAT ASSEMBLY. CRACKS EXISTED IN THE 114W4562-4 COVE SKIN ASSEMBLY AND THE 114W6640 NOSE BEAM ASSEMBLY. PRELIMINARY FINDINGS INDICATE THAT CRACKING APPEARS TO BE THE RESULT OF HIGH CYCLE SONIC FATIGUE. NEW NR 9 SLAT INSTALLED AND AIRCRAFT RETURNED TO SERVICE.