The Cirrus SR22 is known for its fixed landing gear, which simplifies pre-flight checks and reduces maintenance complexity. However, the shock struts, which are the main components of the landing gear that absorb the impact of landings and taxiing, still require consistent, meticulous inspection. For pilots in California, Arizona, and Nevada, where operations may include a variety of runway surfaces and temperatures, a thorough inspection of the shock struts is a non-negotiable part of the annual inspection. It is a matter of consistency and safety, leveraging the authority of a professional aviation mechanic.
This article outlines the key inspection tips for the landing gear shock struts on a Cirrus SR22, emphasizing the importance of professional maintenance and highlighting The Aero Center’s unique 24/7 service that reduces aircraft downtime.
THE CRITICAL ROLE OF SHOCK STRUTS
The main function of the shock struts on a Cirrus SR22 is to absorb the energy of landing and to provide a smooth ride during taxiing. They are designed to dampen the vertical motion of the aircraft, protecting the airframe and engine from excessive stress. A failing shock strut can lead to a variety of issues, from an uncomfortable ride to structural damage. It is an often-overlooked component, but its proper function is critical to the aircraft’s safety and longevity.
The social proof that your aircraft is safe is built on a foundation of trust in the expertise of a professional who meticulously checks every component, no matter how small. This is not a task for a pilot to perform alone. The authority of a certified mechanic is essential for this task, as they have the expertise to spot subtle signs of trouble that an owner might miss.
KEY SHOCK STRUT INSPECTION POINTS
During an annual inspection, a certified mechanic will perform a detailed, multi-step check of the landing gear shock struts. Here are the key points they will focus on:
- Visual Inspection for Leaks: The shock struts are filled with nitrogen and hydraulic fluid. The mechanic will perform a comprehensive visual inspection for any signs of leaks. A leak may appear as an oily residue or a wet spot on the strut. The presence of a leak indicates a failing seal, which means the strut is losing its damping ability and needs to be serviced.
- Checking Strut Extension and Compression: The mechanic will check the extension of the strut. If the strut is not fully extended, it could indicate a loss of nitrogen pressure or a low fluid level. They may also apply weight to the aircraft to check the strut’s compression, ensuring it is compressing and rebounding correctly. A strut that feels “mushy” or “bouncy” may need to be serviced.
- Inspecting the Chrome Plating: The outer part of the strut, where the seals ride, is chrome-plated. The mechanic will inspect this surface for any signs of pitting, rust, or flaking. Pitting or flaking can damage the seals, leading to a leak. If the chrome is damaged, the strut will need to be replaced or re-chromed by a specialist.
- Torque Checks on Attaching Bolts: The shock struts are attached to the airframe with a series of bolts. The mechanic will check the torque on these bolts to ensure they are properly secured. A loose bolt can cause play in the landing gear, leading to a host of other issues, including abnormal wear on the tires and brakes.
- Tire and Wheel Bearing Inspection: While not part of the strut itself, the tire and wheel bearings are closely related components that are checked at the same time. The mechanic will inspect the tire for uneven wear, which could indicate a strut issue. They will also check the wheel bearings for proper lubrication and signs of wear.
THE AERO CENTER’S COMMITMENT TO DOWNTIME REDUCTION
For aircraft owners in California, Arizona, and Nevada, the inconvenience of airplane downtime for an annual inspection is a major concern. This is where The Aero Center distinguishes itself. We are the only 24/7 maintenance center in the region. Our unique service model is built on the principle of consistency and a dedication to getting your aircraft back in the air as quickly as possible without compromising on safety or quality.
Our FAA-certified mechanics are highly experienced with the specific systems of the Cirrus SR22. We follow all manufacturer checklists and a meticulous, step-by-step process to ensure that your aircraft is not only compliant with regulations but is also a safe and reliable machine. Our authority in the field is built on a foundation of trust and a proven track record of providing reliable, expert maintenance to the general aviation community.
Footnotes:
- Cirrus Aircraft. “Cirrus SR22 Maintenance Manual”.
- Federal Aviation Administration. “AC 43.13-1B: Acceptable Methods, Techniques, and Practices – Aircraft Inspection and Repair”.
- All in Aviation. “Cirrus Aircraft Maintenance”.
- The Flying Engineer. “Cirrus SR22 Maintenance Tips”.
The Aero Center is located at William J. Fox Airfield KWJF | Lancaster, CA. Contact us at 209.885.6950 for questions or appointments.