What was found
WHEN THE AIRCRAFT TACHOMETER INDICATES 2,300 RPM, THE EXTERNAL CALIBRATED TACHOMETER SHOWED THE ACTUAL ENGINE RPM AT 2,460 RPM. THIS MAY HAVE BEEN A LONG TERM PROBLEM AS THE ENGINE HAS BEEN TOP OVERHAULED TWICE IN 1546 HRS.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHEN THE AIRCRAFT TACHOMETER INDICATES 2,300 RPM, THE EXTERNAL CALIBRATED TACHOMETER SHOWED THE ACTUAL ENGINE RPM AT 2,460 RPM. THIS MAY HAVE BEEN A LONG TERM PROBLEM AS THE ENGINE HAS BEEN TOP OVERHAULED TWICE IN 1546 HRS.