What was found
TACHOMETER INDICATOR INOPERATIVE. READS 360-370 RPM GROUND. READS 380-390 RMP IN-FLIGHT. ADJUSTED INDICATOR TWICE WITHOUT SUCCESS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
TACHOMETER INDICATOR INOPERATIVE. READS 360-370 RPM GROUND. READS 380-390 RMP IN-FLIGHT. ADJUSTED INDICATOR TWICE WITHOUT SUCCESS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.