Propeller Owner’s Manual
136
INSPECTION AND CHECK
61-00-36
Page 5-17
Rev. 2 Feb/17
D. Blade Track
(1) Check blade track as follows:
(a) Chock the aircraft wheels securely.
(b) Refer to Figure 5-1. Put a fixed reference point
under the propeller, within 0.25 inch (6.0 mm) of the
lowest point of the propeller arc.
1
This reference point may be a flat board with
a sheet of paper attached to it. The board may
then be blocked up to within 0.25 inch (6.0 mm)
of the propeller arc.
(c) Put a narrow piece of tape on the same place on
each blade to mark the tip of the blade.
WARNING:
MAKE SURE THE ENGINE MAGNETO
IS GROUNDED (OFF) BEFORE
ROTATING THE PROPELLER.
(d) Rotate the propeller by hand (opposite the direction
of normal rotation) until a blade points directly at the
reference surface (paper).
1 The propeller does not have a start lock and
blade track must be checked when the propeller
is in high pitch position:
(e) Mark the position of the narrow piece of tape that
was put on the blade to mark the tip of the blade in
relation to the reference surface (paper).
(f) Repeat this procedure with the remaining blades.
(g) Tracking tolerance is ± 0.062 inch (1.57 mm) or
0.125 inch (3.17 mm) total.
(2) Possible Correction
(a) Remove foreign matter from the propeller mounting
flange.
(b) If no foreign matter is present, refer to a certified
propeller repair station with the appropriate rating.
