Calidus
Variable Pitch Propeller - IVO
AutoGyro_POH_Calidus Revision 4.0 – Issue Date 17.JAN.2019 9-1 - 7
4. A propeller blade pitch becomes different to the others. Probable cause, internal
mechanical failure. This will result in significant warning vibration. Reduce power and
assess vibration with consideration of a precautionary landing. If necessary turn off engine
& make immediate precautionary landing.
5. Loss of blade. This will result in severe vibration. Switch engine off and land immediately.
6. Loss of blade tip. This will result in significant vibration. Switch engine off and land
immediately.
7. Loss of complete unit. This could result in destruction of the tail or other structural
damage. Switch engine off and land immediately.
8. Loss of LED indicator lamps. Probable cause; controller failure or fuse blown (25A).
Maintain aircraft speed and propeller pitch at around 80mph to prevent engine over-speed.
9. 25amp panel fuse blows. Loss of power supply to propeller controller, hence propeller.
No pitch change possible, prop will remain at last pitch setting. Make precautionary landing
if unsafe to continue the flight.
10. General Note – an increase in vibration from the engine area should always be
investigated at the earliest opportunity. Typical causes are (but not limited to): loose engine
mounting bolts to airframe or to the engine bearer, loose propeller, incorrect pitch setting
(blade to blade, as set or from jamming), or blade damage. After the instance of such
vibration the engine and airframe should undergo a detailed examination for subsequent
damage. Refer to RSUK for guidance.
9-1.8 Handling and Servicing
Refer to the manufacturer’s documentation, and where applicable RSUK0325 IVO DL3-68
Maintenance Manual.
CAUTION
The propeller is electrically actuated via slip rings and carbon brushes. Surface
corrosion and contaminants will prevent proper electrical connection and
hamper correct operation. Always keep the slip rings clean!
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