BELL 407 — Pilot's Operating Handbook

This document provides information on the Donaldson Inlet Barrier Filter (IBF) system designed for the Bell 407/GX helicopter. It details the system's design, benefits, operational considerations, and maintenance aids to enhance engine performance and protection against debris.

• The IBF system offers maximum engine debris protection.
• It improves airflow compared to traditional inertial designs.
• The filter assembly has a lifespan of 4,500 flight hours with regular cleanings.
• The IBF is lighter than the Engine Air Particle Separator (EAPS) by approximately 2 lbs.
• It is certified for flight in adverse weather conditions like snow.
• The system eliminates the need for engine bleed air maintenance.
• The IBF provides better separation efficiency than inertial separators.
• Common components are shared with other Donaldson IBF systems.