Hartzell HC-E4 3 Series Owner's Manual page 179

(2) Periodic Ground Idle RPM Check
NOTE:
(a) Perform the RPM check in accordance with the
Airplane Flight Manual or Airplane Flight Manual
Supplement.
1 Refer to the Airplane Flight Manual or Airplane
Flight Manual Supplement to determine if there
are any propeller RPM restrictions or limitations.
80
60
40
Before Further Flight - adjust engine rigging to prevent
operation below the specified minimum RPM.
20
No Immediate Action Required - adjust engine rigging to
prevent operation below the specified minimum RPM.
0
0 25
Total hours of operation the propeller has operated on an
Corrective Action Required
INSPECTION AND CHECK
Propeller Owner's Manual
The accuracy of the tachometer is critical to
the safe operation of the aircraft. Refer to
the section, "Tachometer Calibration" in the
Maintenance Practices chapter of this manual
for important information.
Before further flight - retire the blades
and hub from service and overhaul the
remaining components. Correct engine
rigging during propeller reinstallation.
Before further flight - overhaul
the propeller assembly and correct engine
rigging during propeller reinstallation.
50
engine with improper RPM setting.
Figure 5-1
147
75 100
61-00-47
Page 5-9
Rev. 17 Sep/20