Sensenich Propeller Mfg. Co.
Fixed-Pitch Metal Propellers
Instructions For Use And Care
4 September, 1997
Supersedes previous Use a Care Instructions
Service Bulletins and Airworthiness Directives are not
affected by these instructions
Your Sensenich propeller has been manufactured under closely controlled
conditions to the approved design in accordance with the applicable FAA
Regulations. Stamped on the propeller hub face are the Model and Serial
Number, the Type Certificate Number, and the Production Certificate Number
(Sensenich Corp. PC. No. 1NE).
DO:
1. Have your propeller installed by an A&P mechanic. For
convenience, the proper installation bolt torque is shown on the blade decal
near the hub. Always have blade track checked after the hub bolts are
tightened. Note: Every propeller is accurately balanced at the
factory. If the propeller-engine combinatlon feels rough in flight, ask
your mechanic to remove the propeller, rotate it 180 degrees on the engine
crankshaft flange, and re-install. Again check blade track. This provides
a means to verify that the crankshaft flange is true.
2. Inspect the blades of your propeller before each flight for
nicks, cuts, and stone bruises. Have minor repairs promptly performed by an
A&P mechanic. If a crack is discovered, THE PROPELLER MUST BE
IMMEDIATELY REMOVED FROM SERVICE.
3. Have major repairs performed by an FAA Certificated
Propeller Repair Station.
4. Conform to applicable RPM limitations and periodically have
your tachometer checked for accuracy.
5. Frequently wipe the propeller blades clean with an oily rag.
This oily wipe will remove corrosive substances, and the oily residue will
repel water and corrosives.
6. The recommended flight-time between recondinoning for your
Sensenich fixed-pitch metal propeller is Two Thousand hours PROVIDED IT
HAS NOT RECEIVED PRIOR DAMAGE REQUIRING IMMEDIATE ATTENTION. This
accomplishes the removal of fatigued surface metal and the accumulation of
small nicks and cuts taa numerous to be repaired individually.
DO NOT...
permit installation of a propeller unless it is
the model approved under the Aircraft Type Certificate or STC and has been
obtained from a reliable source. Beware of a propeller of unknown service
history.
DO NOT...
push or pull on the propeller when moving an
aircraft by hand.
DO NOT...
run up your engine/propeller over loose stones or
gravel.
DO NOT...
paint over corroded or damaged blades. This hides
the defect and may deter needed repair.
DO NOT...
permit repair of blade damage by peening or welding.
These practices will lead to early blade fallure.
DO NOT...
fly your aircraft under any circumstance before a
thorough inspection by qualified personnel if the propeller has been
subjected to impact.
DO NOT...
have your propeller straightened except by an FAA
Certificated Propeller Repair Station. Even partial
straightening of blades for convenience of shipping to a repair station may
cause hidden damage which, if not detected, could result in the return to
service of a non-airworthy propeller. Report anything of this nature before
repair is initiated.
MINOR REPAIR:
Rounding out a shallow mick or cut shall be considered a minor repair provided
that the strength, weight, and stiffness of the blade is not materially
affected.
MAJOR REPAIR:
Major repairs to aluminum alloy propellers include diameter reduction (when
permissible) to repair tip damage, repairs to deep cuts or nicks, and
straightening of bent blades.
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