As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION FOUND A 1.5 INCH CRACK IN THE FUSELAGE SKIN AT AFT EDGE INSTRUMENT COOLING AIR DUCT OUTLET, STA 380, LBL 4, S28L TO S28R. THE CRACK WAS STOP DRILLED AND AN EXTERNAL DOUBLER AND INTERNAL DOUBLER WERE INSTALLED IAW ECRA 5330-02894.