World Leader In Aircraft Propeller & Governor Services
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Governor Overhaul

Stages and photographs of a governor overhaul: Disassembly & Inspection, Parts Replacement, NDT/Magnaflux, Reassembly.


Governor Overhauls & Repairs

Aircraft propeller governors are an essential component of constant speed and full-feathering propellers, allowing pilots to maintain the desired RPM under varying flight and air conditions.  Damaged or worn governors can cause major performance or safety issues for your aircraft.  During a regularly scheduled engine or propeller overhaul is a great time to also service your governor. Check with your manufacturer for their recommendation.

Disassembled governor.

Disassembled governor.

Disassembly, Inspection & Cleaning

We disassemble the governor in order to clean all internal and external components.  During this time a visual and dimensional inspection will be conducted to detect any obvious surface flaws or damage—such as rust, corrosion or pitting—that require repair or even cause the governor to fail.

Replace components

Each manufacturer specifies a list of internal parts that must be replaced at every overhaul, such as seals, gaskets, o-rings, etc.  We always comply with the manufacturer's specifications and use the proper governor overhaul kit to replace these parts.  We also strictly adhere to any Service Bulletins and Airworthiness Directives when reassembling the governor and considering which other components may need replacing.

Common replacement components

Common replacement components


NDT & reassembly

We magnaflux all steel components in order to detect hairline cracks and other potentially damaging flaws. The governor is then reassembled, complying with all appropriate Service Bulletins, and set to the appropriate specifications.  Function Testing is conducted at our operational test bench to ensure quality performance.  Finally, an 8130-3 Airworthiness form is issued along with a base mounting gasket when we prepare the governor for return shipping.