EASA SIB NM-17-07: AmSafe, Inc. Restraint System Assemblies — End Release Buckle

What to do

Operators of aircraft equipped with affected AmSafe, Inc. restraint system assemblies should promptly follow the inspection and testing procedures outlined in AmSafe Service Bulletin 504443-25-02 Issue 10. If defects are found, the ejector base must be replaced as specified. The FAA recommends completing these actions at the earliest opportunity to ensure continued passenger safety.

Summary

The FAA Special Airworthiness Information Bulletin SAIB: NM-17-07 advises owners, operators, and manufacturers of Normal, Utility, Acrobatic, Commuter Category Aircraft, and Transport Category Airplanes about a potential failure in the end release buckle of certain AmSafe, Inc. restraint system assemblies installed on passenger seats. This bulletin highlights a manufacturing defect in buckle assemblies produced between November 2010 and November 2015 that could cause inadvertent release of restraints under load. The bulletin is informational and does not mandate regulatory action.

What changed

SAIB NM-17-07 introduces awareness of a manufacturing defect in AmSafe, Inc. restraint system end release buckles that may lead to inadvertent restraint release during turbulence. It references AmSafe Service Bulletin 504443-25-02 Issue 10, which provides inspection, testing, and replacement procedures for affected buckle assemblies. The bulletin also corrects figure numbering errors in the service bulletin to ensure proper identification during inspections.

Why it matters

This information is critical for aviation professionals to prevent potential passenger injuries caused by loss of restraint during turbulence. Operators and maintenance teams must be aware of the defect to ensure passenger safety and maintain compliance with recommended safety practices. Early detection and replacement of defective buckle assemblies can mitigate risks without requiring mandatory regulatory directives.