Carburetor balancing
Carburetor rebuilds
Gear box repairs and inspections
Condition inspections
100 hour inspections
Rotax trouble shooting
Rotax repair
Storage Recovery
Services aVAILABLE
Travel time and expenses may be billed based on time/distance traveled.
For locations more than 50 miles away, extended travel is available. Please contact us for more information.
mobile Services
Customers located outside the local service area may ship carburetors and gearboxes for inspection and repair.
All shipments are coordinated in advance to confirm scope of work, turnaround time, and return shipping.
mail-in
Services
Get a quote
Frequently Asked Questions
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We provide inspection, maintenance, troubleshooting, and Rotax engine service for Special Light Sport Aircraft (S-LSA), Experimental Light Sport Aircraft (E-LSA), and Experimental Amateur-Built Aircraft (E-AB).
This includes aircraft such as:
• RANS aircraft (S-6, S-7, S-19, and similar models)
• Kitfox aircraft
• Czech SportCruiser / PiperSport
• Van’s RV-12
• Flight Design aircraft
• Tecnam aircraft
• Other Rotax-powered Light Sport Aircraft
• Experimental Amateur-Built aircraft and kit-built aircraftAll work is performed in accordance with applicable FAA regulations, aircraft operating limitations, and manufacturer maintenance manuals.
If you are unsure of your aircraft category or maintenance requirements, we can review your aircraft records and operating limitations.
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Yes. Owner-assisted maintenance is permitted in certain cases and can help reduce labor costs while allowing owners to become more familiar with their aircraft.
Owner participation depends on the aircraft certification category and FAA regulations.
Experimental Amateur-Built Aircraft (E-AB)
Owners may legally perform maintenance, repairs, and modifications on their aircraft.
We can assist by:
• Providing supervision and technical guidance
• Ensuring work is performed correctly and safely
• Providing documentation assistance
• Performing inspections when required
• Providing logbook documentationExperimental Light Sport Aircraft (E-LSA)
Owners may perform maintenance on E-LSA aircraft. However, the required annual condition inspection must be performed and signed off by:
• FAA Light Sport Repairman – Maintenance (LSRM)
• FAA Light Sport Repairman – Inspection (LSRI) for aircraft owned by that individual
• FAA-certificated Airframe & Powerplant mechanic (A&P)We can assist owners while ensuring proper documentation and sign-off when applicable.
Special Light Sport Aircraft (S-LSA)
S-LSA aircraft must be maintained in accordance with the manufacturer’s maintenance manual and FAA regulations.
Owners may assist with maintenance under supervision when allowed. Required maintenance and inspections must be performed and signed off by authorized personnel such as an LSRM or A&P, as permitted by the manufacturer and FAA regulations.
Before beginning owner-assisted maintenance, we clearly define:
• What tasks the owner may assist with
• What tasks require authorized sign-off
• How maintenance will be documentedThis ensures regulatory compliance and continued airworthiness.
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Yes. We provide mobile maintenance and are willing to travel for inspections, maintenance, and repair work.
This includes:
• Annual condition inspections
• Pre-buy inspections
• Rotax maintenance and troubleshooting
• Rubber replacement service
• Larger maintenance and repair projectsExtended travel is available throughout the Western United States for multi-day and/or multi-airplane service/maintenance/repair projects.
Travel costs include:
• Travel time
• Mileage or transportation expenses
• Lodging when required
• Per diem for multi-day or extended travelWe make every effort to keep travel and per diem costs as reasonable and affordable as possible. Please contact us directly for travel estimates and scheduling.
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Some of the inspection services we provide include:
• Annual Condition Inspections
• 100-hour inspections (when applicable)
• Pre-buy inspections
• Post-purchase baseline inspections
• Logbook and maintenance record review
• Service bulletin and safety directive compliance review
• Compression testing and engine health evaluation
• Rotax gearbox inspection and friction torque checksThese inspections help ensure the aircraft is safe, compliant, and properly maintained.
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Rotax Engine Services
• 5-year rubber replacement
• Carburetor synchronization
• Carburetor inspection and service
• Gearbox inspection and friction torque testing
• Oil and filter service
• Cooling system inspection and service
• Fuel system inspection and maintenance
• Troubleshooting engine performance issuesAirframe Maintenance
• Scheduled and preventative maintenance
• Brake inspection and service
• Wheel bearing inspection and repacking
• Landing gear inspection
• Hardware replacement
• Control system inspection
• General troubleshooting and repairWe also provide aircraft reactivation and return-to-service for aircraft that have been in storage or inactive for extended periods. This includes inspection of engine systems, fuel systems, rubber components, brakes, and critical airworthiness items to ensure the aircraft is safe to operate. Our goal is to return the aircraft to a safe, reliable, and airworthy condition in accordance with FAA regulations and manufacturer requirements.
All maintenance is performed in accordance with FAA regulations and manufacturer maintenance manuals.
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We hold the following FAA certification:
FAA Light Sport Repairman – Maintenance (LSRM)
This certification authorizes maintenance and condition inspections on:
• Special Light Sport Aircraft (S-LSA), when authorized by the manufacturer
• Experimental Light Sport Aircraft (E-LSA)
• Experimental Amateur-Built Aircraft (E-AB)We specialize in Rotax-powered aircraft and follow Rotax maintenance procedures, service instructions, and manufacturer requirements.
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To remain within our scope and ensure the highest quality of service, we do not perform:
• Major engine overhauls or internal engine rebuilding
• Major structural repairs or airframe rebuilds
• Composite structural rebuilds
• Fabric covering or restoration
• Most sheet metal repairs
• Most avionics repairs
• Exhaust system fabrication or major exhaust repair
• Jabiru engine overhaul or engine repair -
Light Sport Aircraft and Rotax engines require specialized maintenance knowledge.
While FAA-certificated Airframe & Powerplant mechanics (A&Ps) are highly trained and knowledgeable, most general aviation aircraft use Continental and Lycoming engines, which differ significantly from Rotax engines.
Rotax engines use unique design features and maintenance procedures, including:
• Gear reduction systems
• Carburetor synchronization requirements
• Specific rubber replacement intervals
• Specialized inspection and maintenance proceduresAn LSRM with Rotax experience understands these systems and requirements.
This helps ensure:
• Proper maintenance procedures
• Compliance with manufacturer requirements
• Accurate inspections
• Safe and reliable aircraft operation -
Hourly Rate: $95 per hour
Scheduling in advance is recommended, especially for extended travel, annual inspections, and larger maintenance projects.
About
NorCal Wrench & Rudder was founded by Sean Armstrong, an FAA-certified aircraft mechanic, Rotax RFSC Series 9 Service and Maintenance certified, former U.S. Air Force mechanic, retired law enforcement professional, and active pilot. NorCal Wrench & Rudder is a mobile aircraft service and repair business specializing in light sport, experimental, and amateur-built aircraft, serving owners who value safety, honesty, and work done right the first time. Based in Cameron Park, California, Sean brings a no-nonsense approach to every job: no shortcuts, no upselling, and no sign-offs on anything he wouldn’t fly himself. Extended travel is available for larger or multi-aircraft projects. Contact us for pricing and more information.