As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ON GROUND MAINTENANCE FOUND LEFT WING FLYING PANEL INBD TRAILING EDGE NEXT TO FUSELAGE HAS 14 INCH CRACK (TOP OF WING). REMOVED PANEL. DRILLED HOLES IN NEW PANEL AND STARTED INSTALLATION. FINISHED INSTALLATION OF NEW PANEL AS PER M/M 57-22-01.