Van Horn Aviation | Composite Rotor Blades

206B/L Main Blade Differences

Unlike our 206 tail rotor blade which fits on B3, L series, and OH-58 models, our 206 main rotor blades are designed specifically for each model (JetRanger or LongRanger; OH-58 is still in development). On the LongRanger main rotor blades, we were also able to incorporate customer feedback from the JetRanger blades.

Here are a few of the key differences between the 206L and 206B main rotor blades:

Flexibility: The increased flexibility of the 206L blade complements Bell’s Noda-Matic nodal transmission suspension system, which is not available on the JetRanger. The combination of softer blades and the nodal mount dampens the 2 per rev vibration inherent in two-bladed rotor systems.

Length/Weight: Matching the original metal blades in length, the 206L blade is 22 inches longer than the 206B blade. However, our 206B and 206L composite main rotor blades weigh about the same as each other (which is about the same as the original metal 206B blade).

Trim Tabs: The 206L blade includes inboard and outboard trim tabs to match existing track and balance procedures of the metal blades; the 206B has one outboard trim tab. Both blades have their own set of polar balance charts.

Tip weights: The 206L does not use external tip weights for inertia as the 206B blade does. Instead, the 206L blade uses a different tip block with internal weights.

Service life/overhauls: The 206L is certificated with a 16,000-hour service life and overhauls required every 4,000 hours. The 206B is certificated with an 18,000-hour life and overhauls required every 2,800 hours.

Another main difference between the blades, which doesn’t have anything to do with the blades themselves, is the supplier. Order the 206B main blades from Aeronautical Accessories. Order the 206L main blades directly from Van Horn Aviation. There is a price difference as well.

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AD Compliance Reminder for Certain 206L MRB Operators

By Kim VHA • April 25, 2025

For 206L LongRanger operators flying P/N 20633000-101 serial numbers A007-A009 or A012-A104, we would like to remind you that these blades are subject to AD 2022-22-08, which requires recurring tap inspections every 400 flight hours or 2,400 engine starts, whichever comes first. You can learn more about the tap test requirements and procedure in our video . These blades are likely to develop a delamination in the area of the weight pocket on the lower surface of the blade. The AD further requires removing the blades from service if the delamination reaches 6 inches in length. However, extensive company testing indicates that all blades will likely achieve their full retirement life before that occurs. So long as the delamination is monitored and does not exceed the permitted length, the blades are entirely safe to fly with no adverse effects on aircraft behavior or performance. Operators are required to report their findings at every inspection interval to VHA for tracking using the form on the last page of Service Bulletin 33000-4 . Completed forms should be emailed to info@vanhornaviation.com . Providing this data helps to ensure all operators of these blades remain safe. All of the identified blades are likely to have delaminations, so if none are detected please contact us for assistance. In addition, this AD is considered an interim action and once sufficient data is gathered it may be updated to reduce the required frequency of inspection. Refer to AD 2022-22-08 and SB 33000-4 for further information.