As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION, FOUND RIGHT FIREWALL SHUT-OFF VALVE FAILED TO RIG PROPERLY. FUEL STILL FLOWED IN AFT POSITION. FOUND VALVE HAD FAILED INTERNALLY. AD 80-18-10 AND PIPER SB 648A APPLIES TO AIRCRAFT WITH LOWER SERIAL NUMBERS, BUT NOT THIS AIRCRAFT. SUBMITTER SUGGESTED SB AND AD BE APPLIED TO ALL SERIAL NUMBERED AIRCRAFT. NEW VALVE WAS INSTALLED AND SYSTEM TESTED PROPERLY. LEFT VALVE WAS ALSO TESTED. (X)