2000 Hour Overhaul Kit

As the world’s largest civilian helicopter manufacturer, Robinson has become known for its reliability and affordability. The company has developed convenient and comprehensive field overhaul kits to “reset” the service life of the more than 100 R66 helicopters that are expected to hit 2000 hour limits in the coming year – a number that will grow each year with the overall fleet size. September’s life limit changes represent a significant change to the composition and cost of 2000 hour kits.

What’s Different – Nuts & Bolts Level

The previous KI-6602 kit has been replaced by the new KI-6606 R66 2000 Hour Inspection Kit to better reflect changes to longer life limitations referenced in R66 Service Letter 48 “Revised Life Limitations” dated 5, September 2024 and R66 Service Letter 49 “Changes to 2000 Hour Kit” dated 16, October 2024.

The revised contents of base KI-6606 2000 Hour Inspection Kit have been greatly reduced but may not include all items required to complete your 2000 hour overhaul. Additional major items may be needed to be purchased. While the modified KI-6606 does add a level of complexity over the previous one-size-fits-all kit, this is offset by the improved flexibility given to operators to order more precisely what is needed for their specific aircraft.

Main Rotor Gearbox & Hydraulics Options

The main rotor gearbox and hydraulic system will dictate which remaining components are needed to complete the overhaul. These items can be purchased individually or as part of a gearbox assembly and/or hydraulic system combination. For operators requiring a gearbox only, the F006-6R/-1R offers two slightly different buildup options, For those desiring the factory pre-assembled gearbox and hydraulic assembly, the F001-11R option is available:

F006-6R Main Rotor Gearbox

4000 Hr. Sub-Components

• C251-3 Shaft
• F143-1 Pinion
• F146-1 Pinion
• F263-1 Housing
• F270-1 Cartridge

Note: MRGB Only, Does not include Hydraulic Pump, Oil Pump, Yoke, or Rotor Brake

F006-1R Main Rotor Gearbox

4000 Hr. Sub-Components

• C251-3 Shaft
• F143-1 Pinion
• F146-1 Pinion
• F263-1 Housing
• F270-1 Cartridge

G003-1 Rotor Brake Assy.

D500-3R MRGB Oil Pump

Note: Does not contain Hydraulic pump, reservoir, servos, etc.

F001-11R MRGB/Hydraulics

C017-6R-Swashplate

• Incl. C647-12 Bearing Set

D211-3R Hydr. Reservoir

D212-5R Hydr. Servo (2)

D212-6R Hydr. Servo

D500-2R Hydr. Pump Assy.

D500-3R MRGB Oil Pump

F006-1R Main Rotor Gear Box

G201-1 Frame, Servo Suppt.

Note: All items are assembled at the factory.

Additional 2000 Hour Inspection Items

Once operators have selected the KI-6606 kit and appropriate gearbox/hydraulics option, there are up to 25 additional items that may be required to fulfill the R66 2000 Hour Inspection (MM Sec. 1-92) and in compliance with remaining R66 Life Limitations (MM Sec. 4-10).

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