EASA SIB 2015-01: WITHDRAWN - FAA UPN TRANSFERRED TO EASA SUP WEBPAGE

What to do

Affected stakeholders should review their inventories and maintenance records to identify any installed Alcoa Fastening Systems barrel nuts with the specified part and batch numbers. They should follow the recommendations outlined in the FAA Unapproved Parts Notification and coordinate with their certification and safety teams. No compliance deadline is specified, and the bulletin's recommendations are not mandatory.

Summary

EASA Safety Information Bulletin SIB No. 2015-01 addresses non-conforming standard hardware specifically Alcoa Fastening Systems barrel nuts with part number NAS577B7A and batch numbers 5334992-000, M004187-000, and 5323292-000. This bulletin informs manufacturers, owners, operators, and maintenance personnel about the FAA's Unapproved Parts Notification related to these parts, which are used on various aircraft, engines, propellers, and appliances. The bulletin clarifies that while the issue is recognized, it does not currently warrant an Airworthiness Directive under EU regulations.

What changed

This bulletin withdraws the FAA Unapproved Parts Notification and transfers the information to the EASA Safety Information Bulletin webpage. It confirms EASA's agreement with the FAA's findings and recommendations regarding the affected barrel nuts but does not introduce mandatory regulatory action or an Airworthiness Directive. The document serves as an informational update rather than a new or amended regulation.

Why it matters

This information is important for aviation professionals because it raises awareness of potentially non-conforming hardware that may have been installed on civil aviation products within EASA member states. Operators and maintenance organizations need to be informed to ensure continued airworthiness and to avoid using suspect parts. Although no mandatory corrective action is required, understanding the issue helps in risk management and compliance monitoring.