FAA proposes AD for Bell 206L helicopters over tail boom vibration risk

The FAA proposes a new airworthiness directive for Bell 206L series helicopters with STC SR02684LA, following an event of severe vertical vibration causing tail boom damage. The directive would mandate RFM limitations revisions, likely adding a never-exceed speed restriction. This is a routine safety regulation affecting a specific helicopter model, with no broader market or geopolitical implications.