Introduction
Welcome to the instruction manual for your LEGO Technic Air Race Jet 42066 Building Kit. This advanced 2-in-1 model offers an immersive building experience, allowing you to construct a highly detailed Air Race Jet or rebuild it into a Private Jet. Featuring a blue, black, and red color scheme with racing stickers, this model incorporates intricate technical details and motorized functions for realistic play and display.

Image: The fully assembled LEGO Technic Air Race Jet 42066, showcasing its aerodynamic design and vibrant color scheme.
Setup and Assembly
The LEGO Technic Air Race Jet 42066 consists of 1151 pieces. Follow the included step-by-step building instructions carefully to ensure correct assembly. Organize your pieces by color and type before you begin to streamline the building process.
Power Functions Motor Installation
This model includes a LEGO Power Functions motor to enable its motorized features. Ensure the motor is correctly integrated into the build as indicated in the instruction booklet. Proper connection of all gears and axles is crucial for the motor's functionality.

Image: The back of the product box, illustrating key features and the integration of LEGO Power Functions components.
Operating the Air Race Jet
Once assembled, your LEGO Technic Air Race Jet offers a range of interactive functions:
- Motorized Adjustable Jet Nozzle: Use the Power Functions motor to adjust the jet nozzle for vertical or horizontal takeoff positions.
- Motorized Hatch Access to Spinning Fan: Activate the motor to open the fuselage hatch and reveal a spinning fan.
- Motorized Retractable Undercarriage: The landing gear can be retracted and deployed using the motorized function.
- Motorized Adjustable Flaps: Control the aircraft's flaps with the Power Functions motor for enhanced realism.
- Manual Front Steering: The front wheel steering can be operated manually.
- Manual Movable Tail Rudders: Adjust the tail rudders by hand.
- Manual Opening Cockpit: The cockpit canopy can be opened manually to reveal interior details.
Video: A short demonstration of the LEGO Technic Air Race Jet 42066, highlighting its various motorized functions and dynamic features.

Image: A top-down view of the LEGO Technic Air Race Jet 42066, showing the overall structure and placement of key components.
Maintenance
To keep your LEGO Technic Air Race Jet in optimal condition, follow these general maintenance guidelines:
- Cleaning: Dust your model regularly with a soft, dry cloth or a soft brush. For deeper cleaning, use a mild soap solution and a soft cloth, then rinse thoroughly with clean water and air dry. Avoid harsh chemicals or abrasive materials.
- Storage: Store your model in a cool, dry place away from direct sunlight to prevent discoloration and material degradation.
- Battery Care: If using the Power Functions motor, ensure batteries are removed if the model will not be used for an extended period to prevent leakage. Replace all 6 AA batteries at the same time for best performance.
Troubleshooting
If you encounter any issues with your LEGO Technic Air Race Jet, consider the following:
- Missing Pieces: If you find any pieces missing from your kit, please contact LEGO Customer Service directly through their official website.
- Assembly Difficulties: Double-check the instruction manual for the specific step you are on. Ensure all pieces are correctly oriented and firmly connected. Sometimes, a small oversight can affect subsequent steps.
- Motorized Functions Not Working: Verify that the 6 AA batteries are correctly installed and fully charged. Check all electrical connections between the battery box, motor, and switches. Ensure no gears are jammed or misaligned.
- Parts Not Moving Smoothly: Inspect for any misaligned or incorrectly placed Technic pins, axles, or gears that might be causing friction.
Specifications
| Feature | Detail |
|---|---|
| Model Number | 42066 (Item model number: 6175715) |
| Number of Pieces | 1151 |
| Product Dimensions | 14.88 x 3.43 x 22.91 inches |
| Item Weight | 4.2 pounds |
| Recommended Age | 10 years and up |
| Batteries Required | 6 AA batteries (not included) |
| Main Features | Motorized jet nozzle, spinning fan, retractable undercarriage, adjustable flaps, working front steering, movable tail rudders, opening cockpit. |
| 2-in-1 Model | Rebuilds into a Private Jet |
| Included Special Element | Uniquely decorated LEGO Technic 40th Anniversary brick |
Warranty and Support
LEGO products are manufactured to high-quality standards. For information regarding product warranty, missing parts, or further assistance, please visit the official LEGO Customer Service website. You can find detailed support resources, FAQs, and contact options there.
Official LEGO Website: www.lego.com/service