As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED ENGINE CHANGE FOUND LT ENGINE MOUNT CHAFED BY EXHAUST PIPE AT LOWER INBD ATTACH FITTING. FOUND RT ENGINE MOUNT CHAFED BY EXHAUST PIPE AT LOWER OTBD ATTACH FITTING. AIRCRAFT HAS BEEN MODIFIED BY STC SA432SO, REPLACEMENT OF ENGINES WITH DIFFERERN MODELENGINES.