What was found
NR 13 CYLINDER THERMAL SHOCKED APPROXIMATELY 20 MILES EAST OF MKE. LEFT ENGINE ROUGH AND BACKFIRING. SHUT ENGINE DOWN, RETURNED TO MKE. REPLACED NR 13 CYLINDER POWER AND LEAK CHECK SATISFCATORY. RETURNED AIRCRAFT TO SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
NR 13 CYLINDER THERMAL SHOCKED APPROXIMATELY 20 MILES EAST OF MKE. LEFT ENGINE ROUGH AND BACKFIRING. SHUT ENGINE DOWN, RETURNED TO MKE. REPLACED NR 13 CYLINDER POWER AND LEAK CHECK SATISFCATORY. RETURNED AIRCRAFT TO SERVICE.