Owner-performed preventive maintenance: what FAA allows on piston aircraft

Taking Flight: What Preventive Maintenance FAA Allows on Your Piston Aircraft

Owning a single-engine or twin-piston aircraft offers unparalleled freedom and a unique connection to the skies. As a pilot and owner, you naturally want to ensure your aircraft is always in top condition. While major repairs and inspections require certified mechanics, the Federal Aviation Administration (FAA) does allow pilots to perform a range of preventive maintenance tasks. Understanding these allowances, detailed in 14 CFR Part 43, Appendix A, Subpart C, can empower you to actively participate in your aircraft’s upkeep, potentially reducing downtime and fostering a deeper understanding of your flying machine.

The Foundation of Owner-Performed Maintenance

The FAA recognizes the owner-operator’s role in maintaining their aircraft’s airworthiness. This responsibility, outlined in Part 91 of the Federal Aviation Regulations, includes ensuring that any maintenance performed adheres to the appropriate standards and is properly documented.¹ For piston aircraft not used in commercial operations (Part 121, 127, 129, or 135), certificated pilots have the privilege of performing specific preventive maintenance tasks. This is a testament to the FAA’s trust in a pilot’s commitment to safety and adherence to established procedures.

It’s crucial to understand that “preventive maintenance” refers to simple, minor preservation operations and the replacement of small standard parts that do not involve complex assembly operations.² This isn’t about overhauling an engine or rebuilding a wing, but rather about proactive care that keeps your aircraft running smoothly between professional inspections.

Common Owner-Performed Preventive Maintenance Tasks

The list of permitted tasks is extensive and practical for the diligent aircraft owner. Here are some of the most common and beneficial operations you can perform:

TIRES, WHEELS, AND LANDING GEAR:

• Removal, Installation, and Repair of Landing Gear Tires: This includes patching, cleaning, and replacing tires.³ Proper tire pressure is critical for safe takeoffs and landings, and as an owner, you can monitor and adjust this.
• Servicing Landing Gear Shock Struts: This involves adding oil or air to maintain proper strut pressure and function.
• Servicing Landing Gear Wheel Bearings: Cleaning and greasing wheel bearings regularly is vital for smooth operation and extends their lifespan.⁴

ENGINE AND PROPELLER CARE:

• Lubrication: This covers any lubrication that doesn’t require complex disassembly, such as lubricating hinges, control linkages, and other accessible components.
• Changing Engine Oil and Oil Filters: A routine oil change is one of the most fundamental preventive maintenance tasks, essential for engine longevity.⁵ Remember to clean or replace fuel and oil strainers or filter elements as part of this process.
• Cleaning or Replacing Spark Plugs and Setting Gap Clearance: Properly functioning spark plugs are critical for engine performance and efficiency.⁶
• Replacing Engine Cowling: This refers to cowlings that do not require propeller removal or disconnection of flight controls.⁷ It allows for visual inspections of the engine compartment.
• Replacing Prefabricated Fuel Lines and Hose Connections (excluding hydraulic): These simple replacements can prevent leaks and ensure proper fuel flow.⁸

STRUCTURAL AND INTERIOR UPKEEP:

• Making Simple Fabric Patches: This is limited to patches that don’t require rib stitching or the removal of structural parts or control surfaces.⁹
• Refinishing Decorative Coatings: Applying paint or other protective materials to non-structural surfaces, such as the fuselage, wings, tail, fairings, cowlings, landing gear, cabin, or cockpit interior, is permitted, provided it doesn’t involve primary structure disassembly.¹⁰
• Repairing Upholstery and Decorative Furnishings: This includes interior repairs that do not involve primary structure or operating systems.¹¹
• Replacing Side Windows: This is allowed if the work doesn’t interfere with the aircraft’s structure or operating systems.¹²
• Replacing Safety Belts and Seats/Seat Parts: Provided the replacement parts are approved and do not involve disassembly of primary structure.¹³

ELECTRICAL AND MISCELLANEOUS:

• Replacing and Servicing Batteries: This includes checking water levels in lead-acid batteries and ensuring proper connections.
• Troubleshooting and Repairing Broken Circuits in Landing Light Wiring: Simple electrical repairs can often be done by the owner.
• Replacing Bulbs, Reflectors, and Lenses of Position and Landing Lights: Ensuring all lights are functional for safe operations.¹⁴
• Replacing Defective Safety Wiring or Cotter Keys: Small but vital components that prevent fasteners from loosening.
• Removing, Checking, and Replacing Magnetic Chip Detectors: These detectors provide early warnings of internal engine wear.¹⁵

While the FAA provides this list, it’s not exhaustive. The general principle is that if the task is simple, doesn’t involve complex assembly, and doesn’t require specialized tools or knowledge beyond what a pilot would reasonably possess, it’s likely considered preventive maintenance. Always consult your aircraft’s maintenance manual and 14 CFR Part 43, Appendix A, Subpart C, for definitive guidance.

The Importance of Proper Documentation

Regardless of how minor the task, accurate record-keeping is paramount. For every owner-performed preventive maintenance task, you must:

• Describe the work performed: Be specific about what you did.
• Include the date of completion: When was the work finished?
• Provide your signature, certificate number, and kind of certificate held: Your credentials validate the work.

This documentation serves as a critical historical record of your aircraft’s maintenance and is essential for maintaining its airworthiness certificate. When you consistently document your work, you build a comprehensive history that demonstrates your commitment to safety and due diligence.

Why Professional Maintenance Remains Indispensable

While owner-performed preventive maintenance offers benefits, it is not a substitute for the expertise of a certified Airframe and Powerplant (A&P) mechanic. Complex repairs, annual inspections, 100-hour inspections (if applicable), and any work affecting the aircraft’s primary structure or operating systems must be performed by appropriately rated professionals.

At The Aero Center, we understand the owner’s desire to be involved in their aircraft’s care. Many of our clients have told us how empowering it is to perform these allowed tasks. However, they also attest to the peace of mind that comes from knowing a team of experienced, certified mechanics is available for all other maintenance needs. We pride ourselves on building long-term relationships with our clients, offering guidance on owner-performed tasks and providing expert support for everything else.

The Aero Center services California, Arizona, and Nevada, providing top-tier maintenance for single-engine and twin-piston aircraft. We are the only 24/7 maintenance center in the area, a commitment that significantly reduces aircraft downtime. We understand that your time in the air is valuable, and our round-the-clock availability ensures your aircraft is back in service faster. Our team of highly skilled mechanics stands ready to assist with all your maintenance needs, from routine inspections to complex repairs, ensuring your aircraft is always safe and airworthy.

Trust in Expertise and Community

Many experienced pilots and aircraft owners will tell you that the best way to approach maintenance is through a combination of diligent owner-performed tasks and consistent reliance on certified professionals. Forums and pilot organizations are filled with success stories of owners who, by understanding their aircraft intimately through preventive maintenance, were able to identify minor issues before they became major problems. This shared knowledge and experience within the aviation community reinforces the value of both approaches.

For specialized guidance, or when a task falls outside the scope of owner-performed maintenance, knowing you have a reliable and available resource is key. The Aero Center’s commitment to 24/7 service means you’re never left waiting, a testament to our dedication to keeping you flying safely and efficiently.

Footnotes:

1. Federal Aviation Administration. 14 CFR Part 43 – Maintenance, Preventive Maintenance, Rebuilding, and Alteration.¹⁶ https://www.ecfr.gov/current/title-14/chapter-I/subchapter-C/part-43
2. Federal Aviation Administration. Appendix A to Part 43—Major Alterations, Major Repairs, and Preventive Maintenance.¹⁷ https://www.ecfr.gov/current/title-14/chapter-I/subchapter-C/part-43/appendix-Appendix%20A%20to%20Part%2043
3. FAA Safety Team. Maintenance Aspects of Owning Your Own Aircraft. https://www.faasafety.gov/files/gslac/library/documents/2011/Aug/56398/FAA%20P-8740-15%20Maintenance%20Aspects%20of%20Owning%20Your%20Own%20Aircraft%20%5Bhi-res%5D%20branded.pdf
4. AOPA. Owner-Performed Preventive Maintenance: The mysteries of FAR 43. https://www.aopa.org/news-and-media/all-news/2019/october/pilot/savvy-aviator-preventive-maintenance

The Aero Center is located at William J. Fox Airfield KWJF | Lancaster, CA. Contact us at 209.885.6950 for questions or appointments.