As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION OF REAR SPAR CARRY-THROUGH ATTACH FITTINGS PER PIPER SB 977, IT WAS NOTED THE FITTING SCREWED TO IT WAS CORRODED TO THE POINT OF UNAIRWORTHINESS. THIS PART IS NOT INCLUDED AS PART OF THE INSPECTION PER THE SB. BOTH LT AND RT SIDE FITTINGS WERE CORRODED.