Understanding the King Air High Utilization Inspection Program

Beechcraft King Air

King Air follows a phased schedule of inspections—phases one through four—that are each triggered by a set number of flight hours and focuses on different parts of the aircraft per phase. With these King Air phased inspections, inspections occur every 200 flight hours and a King Air owner is required to complete all four phases every 24 months.

But what about those owners and operators who fly their King Air 400 hours or more annually? Enter the King Air High Utilization Inspection Program (HUIP). Under this inspection program, King Air owners/operators can continue to progress through the 200-hour phase inspection program or they can transition to a new schedule of inspections if they fly more than 400 hours per year.

Which King Airs Qualify for HUIP

The King Air High Utilization Inspection Program isn’t available for all King Airs. Specifically, it’s available for the King Air B200, 300, and B300 series, including:

  • B200 Series
    • BB-1158, BB-1167, BB-1193 and after
    • BL-73 and after
    • BT-31 and after
    • BN-5 and after
    • BY-1 and after
    • BZ-1 and after
  • 300/B300 Series
    • FL-1 and after
    • FM-1 and after
    • FA-2 and after

Again, if any owner/operator of the above aircraft fly less than 400 hours per year, then they do not qualify for the HUIP program.

King Air High Utilization Inspection Program Details

The HUIP program consists of eight total inspections—four detailed inspections and four routine inspections. The detailed inspections occur every 400 flight hours. The routine inspections occur in between the detailed segments and occur every 200 hours. A tolerance of approximately 20 flight hours is allowed per inspection, and tolerances do not accumulate. 

In order for an owner/operator to transition to the HUIP program, they must first complete any remaining standard phased inspections, or perform a complete standard inspection. The times, cycles, and dates of those inspections will be used to establish a base line for the new HUIP cycle.

The HUIP program is particularly helpful for part 135 customers who are flying constantly.

Low Utilization Programs

Alternatively, what about the operators who don’t fly often and struggle to hit the 200 flight hour mark within the 24 month period? There are certain programs owners and operators can petition the FAA with for low utilization. If approved, they will receive a revised phased inspection program.

A great example of a LUI program is the Pratt & Whitney Low Utilization Inspection (LUI) program. The Pratt & Whitney LUI program is for engines that haven’t reached their flight hours or haven’t been disassembled within the past ten years. If an engine fits those requirements, operators are required to perform an off-wing inspection and disassembly of their engine after ten years of service. They are required to perform a visual inspection for corrosion of structural cases and ducts, an inspection of the electrical connectors, as well as oil quality checks and a borescope inspection of the compressor, diffuser, combustor, and turbine. An engine performance run is also recommended. If all of these inspections pass, the operator can continue operating the engine for another 24 months before repeating the inspection.

A LUI is ideal for owners and operators who fly infrequently.

Benefits of a High or Low Utilization Inspection Program

A revised schedule of inspections is helpful for those who fly frequently or infrequently. These revised schedules can help owners save money and help continue to make aircraft ownership a rewarding experience. 

At Winner Aviation, we’re able to help customers navigate what schedule of inspections may be right for them. Contact us today to discuss your options and how you can get the most out of your aircraft.

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