As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRACK IN FUSELAGE SKIN AT BS 727F+4" BELOW STR 23L AT CHEM MILL STEP. ACFT GROUNDED. REPAIRED SKIN IAW SRM 53-00-01-2R-31, DETAIL VII. THIS IS A CATEGORY B REPAIR. INSPECTION THRESHOLD SET AT 66,000 CYCLES. REFER TO THE OPERATORS REPAIR ASSESSMENT PROGRAM FOR METHODS AND INTERVALS. REF SRM 53-00-01-2R-31, TABLE IX.