This Hirobo replacement part HI0403221 is the cooling fan cover stay intended for the GPH 346 helicopter family. It secures the fan cover and helps keep the cooling assembly stable during normal flight and ground handling.
Installation is straightforward for users familiar with GPH 346 airframes: remove the existing cover fasteners, align the stay with the cover and mount points, and secure with the original screws. No special adapters are required when used with stock GPH 346 mounting points, but confirm screw engagement and clearance before flight.
In routine maintenance, this stay maintains the fan cover position to preserve the designed airflow path, supporting predictable cooling behaviour of the fan assembly. Fit it as a direct replacement when a cover mount shows wear.
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