EASA SIB 2019-03: Leonardo AW169 Helicopters - Main Rotor Damper Link — Inspection / Degradation Monitoring

What to do

Operators of AW169 helicopters with the specified damper link part number should follow the inspection and monitoring instructions provided in Leonardo S.p.A.'s In-Service Event letter 169009E and Alert Service Bulletin 169-101. These inspections should be conducted at reduced intervals until the improved damper link design becomes available. No mandatory compliance deadline is specified, but prompt action is recommended.

Summary

EASA Safety Information Bulletin 2019-03 is an airworthiness bulletin addressing inspection and degradation monitoring of the main rotor damper link on Leonardo AW169 helicopters. It applies specifically to AW169 helicopters equipped with main rotor damper links Part Number 6F6220V00452. The bulletin informs operators about reported premature removal of the damper link due to degradation issues such as inner member debonding and cracks in bearing components.

What changed

This bulletin introduces inspection instructions and degradation monitoring procedures for the main rotor damper link on affected AW169 helicopters. Leonardo S.p.A. is developing an improved damper link design to enhance reliability, but until it is available, operators are advised to perform inspections at reduced intervals as detailed in Leonardo's In-Service Event letter 169009E and Alert Service Bulletin 169-101.

Why it matters

The degradation of the main rotor damper link can cause high vibration levels during flight and reduced helicopter control, posing operational safety concerns. Aviation professionals, including operators and maintenance organizations, need to monitor this component closely to prevent potential in-flight issues and maintain airworthiness. The bulletin helps ensure continued safe operation without mandating an Airworthiness Directive at this time.