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Why do I have to
overhaul my propeller after 5 or 6 years when it has limited time since
We recommend you adhere
to the manufacturer's published overhaul limits to protect your safety,
your investment and to maximize the safe operating life of your
During normal operation, an aircraft propeller is subjected
to 10 to 20 tons of centrifugal force per blade. It is necessary to have
the propeller overhauled at the recommended intervals to avoid a
propeller-related incident/accident that could result in serious injury
What happens to
a propeller during overhaul?
An overhaul, by
definition, is the periodic disassembly, inspection, repair, refinish and
reassembly of a propeller system.
Technicians will disassemble and conduct a thorough
inspection of all reusable parts. The assessment includes visual,
magnetic particle, eddy current and dye penetrant
inspections. Additionally, all reusable parts are dimensionally inspected
to ensure they are within tolerance after any type of repair and
eliminate all evidence of scratches, nicks, burrs, corrosion and other
damage. The propeller is then reassembled to factory specifications,
lubricated, balanced and returned to service having complied with all
applicable service documents and airworthiness directives.
I have a large
nick on the edge of one of my blades, can I repair it?
Local repairs to aluminum blades may be made by
an A&P mechanic, propeller repairman or the aircraft builder
(experimental) in accordance with FAA Advisory Circular 43.13-1B.
Composite blade inspection and repair requires specific training,
equipment and techniques.