As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DELAMINATION OCCURRING AT LT FRONT WING SPAR / STRUT LOCATION. CRACK AT BOTTOM EDGE, AT WING ROOT FITTING. POSSIBLE AGE OF SPAR CAUSING DELAMINATION. LONGITUDINAL CRACK AT WING ROOT POSSIBLE EARLIER DAMAGE. REPLACED WITH NEW WOOD SPAR P/N 5146L.