As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT LANDED AFTER CROSS-COUNTRY. WHEN THE PILOT ATTEMPTED TO DEPART, ENGINE WOULD NOT START. TROUBLESHOOTING DETERMINED THE POINTS IN THE LEFT MAGNETO WOULD NOT CLOSE COMPLETELY. GAP WAS WITHIN TOLERANCE. RETURN SPRING APPEARED TO BE BOWED, NOT SUPPLYING ENOUGH TENSION. INSTALLED NEW CONTACT KIT.