The Vertical MRO Podcast

Vertical MRO Alerts: By Bell - Ep 9: Bell 429 Main Rotor Mast Inspection

July 29, 2026·4 min
Episode Description from the Publisher

Welcome to Vertical MRO Alerts, presented by Bell! In this Alert, Bell 429 Product Support Engineering Lead Sebastien Rousseau discusses Alert Service Bulletin 429-26-74, which introduces a one-time inspection of certain Bell 429 main rotor mast assemblies for machining marks on the inner diameter. Sebastien explains Bell's investigation that these machining marks can affect mast fatigue life, and the required actions based on the mast's accumulated hours. He also reviews the compliance tim...

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