King Air Parts and Maintenance

King Air Intro

The Beechcraft King Air has spent more than 60 years earning a reputation for ruggedness and versatility across private, charter, medevac, and fleet operations.

Keeping one flying depends on a handful of interconnected systems: landing gear, wheel & brake, fuel, electrical, hydraulic, mechanical, and pneumatic. Each has its own parts, wear points, and maintenance intervals.

At Aircraft Accessories International (AAI), we work on King Air aircraft components every day as an FAA and EASA Part 145 repair station. This guide walks through the King Air models AAI supports and what owners, mechanics, and fleet operators should know about maintaining each of the aircraft's core systems.

King Air Landing Gear Inspection Requirements

King Air landing gear requires a major inspection every 8,000 cycles or 6 years, whichever comes first. A 6-year inspection includes the removal of the main gear assemblies, main gear drag braces, nose gear, and nose gear drag brace for full teardown. Though Beechcraft calls this an “inspection,” performing it correctly requires a full overhaul-level process: disassembly, stripping, cleaning, visual/dimensional/non-destructive inspection, machine shop repair (as needed), reassembly, testing, and an FAA Form 8130-3 certificate.

Common Landing Gear Inspection Findings

Common findings include worn bushings, out-of-tolerance bores, chrome damage, and corrosion or cracking in high-load areas. AAI typically completes a King Air landing gear overhaul in 20-30 days.

Landing Gear Repair Services

Inroughly 90% of cases, AAI can repair rather than replace a landing gearcomponent.Repairs are completed using an existing or newly engineered FAA-approved specialized repair, and more than 50 of these are already on file specifically for King Air (oversized bushing repairs, piston re-chrome, axle journal restoration, trunnion bore repair, and more).

King Air Wheel and Brake Parts and Services

Wheel and brake assemblies take direct impact on every landing and are among the parts AAI overhauls and exchanges for King Air aircraft.

Wheel and Brake Content - Coming Soon!

Stay tuned – we’ll be producing future videos and articles about brake wear indicators, wheel assembly inspection intervals, and AAI's repair-or-replace process.

King Air Fuel System Parts and Services

King Air Fuel Pumps

Every King Air relies on two fuel pumps: an engine-driven pump as the primary source and an electric pump as a secondary/backup. Common designs include centrifugal boost pumps (which supply and back up the engine-driven pump and can transfer fuel tank to tank) and vane-type pumps (constant-displacement pumps used as both primary and auxiliary units).

Signs a Fuel Pump Needs Service

• Engine RPM fluctuations
• Fuel flow or pressure fluctuations
• Leaks or loose fittings
• Corrosion

Fuel Pump Repair Services

AAI overhauls fuel pumps from manufacturers including Lear Romec, Kelly Aerospace, Dukes, Parker Airborne, Rapco Fleet Support, Weldon, TCM Continental, and Precision Airmotive, plus King Air-specific parts like gate shutoff valves.

King Air Electrical System Parts and Services

King Air Electric Landing Gear Motor Inspection Requirements

Some King Air models use electric landing gear and flap motors. King Air is named alongside the Bonanza and Baron as one of three Beechcraft platforms using this design. A landing gear motor consists of a housing, armature, field assembly, bearings, brushes, and wires, and Beechcraft recommends a 2,000-hour time-between-overhaul.

Signs a Landing Gear Motor Needs Service

Watch for: a burning smell from the motor or wiring, loose wires or connections, and slower-than-normal gear retraction or extension speed.

Electric Motor Repair Services

AAI manufactures its own FAA-approved replacement brushes and offers armature/field assembly rewinding in-house, so the entire motor doesn't have to be scrapped.

Starter generators, blower controllers, flap motors, and solenoids round out AAI's King Air electrical capabilities.

King Air Hydraulic Parts and Services

Most King Air landing gear extension, retraction, and braking is hydraulically actuated (electro-mechanical retraction is limited to certain older models; see Electrical Systems above).

Hydraulic components AAI services on King Air aircraft include landing gear actuators, shimmy dampers, and MLG/NLG assemblies.

More Hydraulic Part Content Coming Soon!

King Air Mechanical Parts and Services

King Air Landing Gear Actuator Inspection Requirements

King Air landing gear actuators (also called landing gear gearboxes) and landing gear transmissions fall under AAI's mechanical capabilities. Per Beechcraft's requirements, the landing gear actuator end-play check is due every 1,000 cycles or 30 calendar months, and the actuator clevis hole must be inspected every 1,000 hours: standard practice during actuator overhaul when a part comes in to AAI.

Signs a Mechanical Actuator Needs Service

King Air aircraft also use trim tab and flap actuators as part of the flight control system, with wear typically concentrated in the external/internal screw, housing, sprockets, and bearings.

King Air Pneumatic Parts and Services

Pneumatic components on King Air aircraft include ice vane actuators and related de-ice/pressure system parts.

More Pneumatic Part Content Coming Soon!