King Air Proper Dynamic Balancing Extends Life of Aircraft

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October 2009

Proper dynamic balancing of the props on a King Air is an excellent way to extend the life of the overall aircraft; to ensure that acceptable methods were used, always inspect the attached weights. Duncan Aviation technicians have seen King Airs come in with issues related to the dynamic balancing. We have seen temporary weights attached to a spinner attach screw inadvertently left on as well as stacks that exceed the allowable amount in one location.

In addition, unless there are instructions from the OEM, you will need FAA form 337 if weights are installed as a minor airframe alteration. Certain types of dynamic balance equipment can also be used to measure a wider spectrum of vibrations and isolate specific engine components for further troubleshooting.

King Air Technical Support

	Cable, Jerry - Accessory Tech Rep - Lincoln, NE (LNK). Aviation professional since 1991. Airframes: Astra / Westwind, Challenger, Citation, Embraer, Falcon, Gulfstream, Hawker, King Air, Learjet Profile: Hydraulic equipment and pumps, Pneumatic valves, Wheel and Brake, Emergency Power Supplies, Electric Motors, Mechanical Actuators, Landing Gear and Accessory Components and Systems Specialist.
	Direct: 402.479.8112 Mobile: 402.432.0154

	Campbell, Curt - Avionics Tech Rep - Lincoln, NE (LNK). Aviation professional since 1975. Airframes: Challenger, Hawker, King Air, Learjet Profile: Air Data Computer, Auto Pilot Systems, EFIS, Roll Modules, Mode Couplers and Selectors, Static Inverters, Servos, Spoiler System, Tool Calibration Lab, Flight Guidance Computer, Cabin Displays, and EFD Components and Systems Specialist.
	Direct: 402.479.4220 Mobile: 402.416.8832

	Magnus, Dan - Avionics Tech Rep - Lincoln, NE (LNK). Aviation professional since 1976. Airframes: Citation, Embraer, Gulfstream, Hawker, King Air Profile: ADF, Comms, Control Heads, CVR, DME Gables Control Heads, Receivers, Nav-Comm/Receivers, Radar Systems, GPS, GNS, Transponders and UNS Components and Systems Specialist.
	Direct: 402.479.4217 Mobile: 402.416.1870

	Schultz, Gerry - Avionics Tech Rep - Lincoln, NE (LNK). Aviation professional since 1965. Airframes: Hawker, King Air Profile: Instrumentation, Vertical and Directional Gyros, Airspeed Indicators, HSI, ADI, Encoders, Course Indicator, Rate Gyro, Directisyn, Vertisyn, RMI and Pitot Static Components and Systems Specialist.
	Direct: 402.479.4212 Mobile: 402.416.4742

	Troyer, Larry - Avionics Tech Rep - Lincoln, NE (LNK). Aviation professional since 1982. Airframes: Astra / Westwind, Falcon, Hawker, King Air Profile: Air Data Computer, Auto Pilot Systems, EFIS, Roll Modules, Mode Couplers and Selectors, Static Inverters, Servos, Spoiler System, Cabin Displays, and EFD Components and Systems Specialist.
	Direct: 402.479.4219 Mobile: 402.416.8835

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