Hartzell HC-E3YR-7 Owner's Manual page 173

(6) Examine the blades and compare blade-to-blade
differences:
(a) Inspect the propeller blades for unusual looseness or
movement. Refer to the section "Loose Blades" in this
chapter.
(b) Examine blade track. Refer to the section "Blade
Track" in this chapter.
CAUTION:
(c) Manually (by hand) attempt to turn the blades
(change pitch).
(d) Visually check for damaged blades.
(7) If abnormal blade conditions or damage are found,
perform additional inspections by qualified personnel at
a certified propeller repair station with the appropriate
rating to evaluate the condition. Refer to the Blade
Repairs section in the Maintenance Practices chapter of
this manual.
(8) If cracks or failing components are found, these parts
must be replaced before further flight.
(a) Report such incidents to airworthiness authorities and
Hartzell Propeller Inc. Product Support.
INSPECTION AND CHECK
Propeller Owner's Manual
136
DO NOT USE BLADE PADDLES TO
TURN THE BLADES.
61-00-36
Page 5-15
Rev. 2 Feb/17