Lycoming Airworthiness Directive: Ensuring Your Aircraft's Safety with Aviation Laboratories

As leaders in aviation analysis, Aviation Laboratories is committed to keeping our valued customers informed about critical industry updates. The recent Federal Aviation Administration (FAA) Airworthiness Directive (AD) concerning Lycoming engines is a significant development that requires immediate attention from aircraft owners and operators.

Understanding the Directive

Effective December 5th, 2024, the new AD mandates the following for many Lycoming engine models:

• Visual inspection of the oil filter or screen during every oil change
• If bronze particles are detected and traced to the Connecting Rod Bushing, a visual inspection of this part is required
• Replacement of the Connecting Rod Bushing if confirmed as the source
• No further visual inspections for bronze particles are required post-replacement under this AD

It's crucial to note that part replacement should never be postponed beyond the standard overhaul period.

Who Needs to Take Action?

This directive affects owners and operators of aircraft equipped with numerous Lycoming engine models. If you're operating an aircraft with a Lycoming engine, it's essential to familiarize yourself with these new requirements and take appropriate action.

Why Filter Analysis, Not Oil Analysis?

We've received inquiries about using oil analysis to satisfy the AD requirements. However, it's crucial to understand that the AD specifically calls for filter analysis. Here's why:

• Oil analysis primarily detects elements smaller than 10 microns, while bronze particles are typically larger
• Bronze is an alloy (a combination of copper and tin), not a single element
• Oil analysis might show increases in copper and tin, but these could come from sources other than bronze (like brass or various additives)
• Filter analysis can definitively identify bronze particles, providing the specific information required by the AD

Lycoming understands these limitations, which is why they've specified filter analysis in the AD.

Aviation Laboratories: Your Trusted Partner in Compliance

As experts in aviation-only analysis, we offer unparalleled services to help you meet the new AD requirements:

• State-of-the-art equipment for precise metal particle detection
• Rapid turnaround times to minimize downtime
• Expert interpretation of results by experienced technicians
• Comprehensive support to ensure AD compliance

Take Action Now

Don't wait until the December 5th deadline. Protect your aircraft and ensure compliance:

• Visit our website to purchase a filter analysis kit P/N: GA-OF-CK-LYC
• Contact our expert team for personalized advice and answers to your questions at 713-864-6677 or email [email protected]

At Aviation Laboratories, we're not just a service provider - we're your dedicated partner in maintaining aircraft safety and compliance. Let us help you navigate this new directive with confidence and peace of mind.