The Hirobo HI0403221 cover stay is a replacement component for the GPH 346 helicopter range. It holds the fan cover in place to keep the cooling assembly steady during flight and ground handling.
Fitting is simple on standard GPH 346 mounts: remove the old fasteners, line up the stay with the cover and mounting points, then refit using the original screws. No special mounting hardware is normally required; always check clearance and screw engagement before flying.
During maintenance this stay preserves consistent airflow by keeping the cover aligned, which helps maintain expected cooling behaviour of the fan unit. Replace worn stays during scheduled servicing to keep components seating correctly.
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