As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE CWP LIGHT ON WITH PROP OIL TEMPERATURE AND PRESSURE ERRATIC PROP WOULD NOT SYNC. CLEANED DEICE FLUID FROM CANNON PLUG 163VP. OPERATIONAL TEST OF POWER PLANT AND GEARBOX OIL PRESSURE SWITCHES GOOD. OPERATIONAL TEST OF PROP SYNC SYSTEM GOOD.