EASA SIB SAIB-2026-07: Main Landing Gear Attach Section - Trunnion Pins

What to do

Owners, operators, and maintainers of the affected Learjet models should promptly review and comply with the applicable Learjet alert service bulletins listed in the bulletin. They should also incorporate the specified temporary or permanent maintenance manual revisions to ensure correct installation procedures are followed in future maintenance. These actions should be taken at the earliest opportunity, especially for aircraft recently serviced on the main landing gear.

Summary

The FAA Special Airworthiness Information Bulletin SAIB: 2026-07 addresses the potential improper installation of the aft trunnion pin in the main landing gear of Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, 55, and 60 airplanes. This bulletin informs owners, operators, and maintainers about the risk of main landing gear collapse during taxi, takeoff, or landing due to this issue. It provides recommended inspections and maintenance manual revisions to mitigate the risk.

What changed

SAIB 2026-07 introduces awareness of the aft trunnion pin installation issue and references Learjet alert service bulletins for affected models recommending a one-time inspection and corrective actions. It also highlights temporary and permanent maintenance manual revisions to ensure proper future maintenance of the main landing gear trunnion pins. This bulletin does not mandate regulatory action but serves as an advisory.

Why it matters

This information is critical for aviation professionals to prevent main landing gear failure, which can lead to accidents and damage during ground operations or flight phases. Operators and maintenance organizations must be vigilant in inspecting and correctly installing the aft trunnion pins to maintain aircraft safety and airworthiness. Compliance with the recommended service bulletins and maintenance manual updates helps reduce the risk of gear collapse incidents.