Cub Crafters CC18-180 Maintenance Manual page 309

(e) Remove the propeller from the flange. A slight rocking may be necessary to
remove the propeller. Be careful during the removal; if the propeller is tight on
the flange it is possible to tear out the back of the hub around the center bore
and bolt hole counterbores.
(f) Assistance may be needed to hold the propeller, plates and rear spinner
bulkhead.
(2) INSPECTION
(a) Be certain that the magneto switches are off and that both magnetos are
grounded.
(b) Inspect for bruises, scars, or other damage to wood and blade leading edge
protection. Assume that your propeller is un-airworthy after any kind of impact
until qualified personnel have inspected it.
(c) All wood and metal tipping repairs must be made at the factory or by an
approved propeller repair station.
(d) Check propeller balance whenever there is evidence of roughness on operation.
(e) If your propeller begins to show any of the following damage, it should be retired
from service:

Cracks in hub bore,

A deep cut across the wood grain,

A long, wide, or deep crack parallel to the grain,

A separated lamination,

Oversize or elongated hub bore or bolt holes,

An appreciable warp (discovered by inspection or through rough operation),

An appreciable portion of wood missing or,

Obvious damage or wear beyond economical repair.
(3) HUB INSPECTION
(a) Remove propeller in accordance with previous instructions.
(b) Clean both propeller hub faces using light grit scotch pad and de-natured alcohol.
It should be possible to remove most of any fretting marks and darkened areas.
(c) Inspect the propeller's rear hub face for cracks and/or elongation of the bolt holes
and/or counterbores where the engine flange drive bushings are inserted.
Manual number TC10000AMM
Date: 07/18/12
CUB CRAFTERS, INC.
CC18-180 MAINTENANCE MANUAL
60-00
Page: 7