SWIRL-2
19/24
9.1. Regular maintenance (by the user)
For a safety use of the SWIRL-2 propellers, it is necessary that the user performs regular maintenance to detect any
abnormalities. This maintenance is usually just a simple check.
Frequency of checking:
Each pre-flight
Control methods:
Visual inspection & Manual handling
Checkpoints:
- Fixation of the propeller: Manually maintaining the tip of a blade of the propeller, shake it firmly to feel if a
too much clearance appears in the setting of the propeller.
- Degradation of material: Check visually the entire propeller without dismantling (blade root, Inconel leading
edge, surface of the blade, spinner, hub, etc.)
- Fixation of the spinner: Check visually the fixation screws of the spinner. A marking paint can be made
between each screw and spinner to have a means of visual inspection of proper tightening the screws.
Possible problems:
- Too much clearance in the propeller fixation
- Surface degradation due to dirt or impact / Crack apparent
Corrective actions (depending on the importance):
1. Clean the propeller with the DUC cleaning treatment DUC (ref. 01-80-003)
2. Perform a repair with the DUC repair kit (ref. 01-80-004)
3. Tighten the screws to proper torque with wrench
4. Replace(s) damage component(s)
5. Contact DUC Hélices to define a solution
9.2. General maintenance (by the user or an aeronautics workshop)
A general maintenance by the user or an aeronautics workshop must be made at lower frequency.
Frequency of checking:
Every 100 hours or annually
Control methods:
Visual inspection & Torque wrench
Checkpoints:
- Fixation of the propeller: By removing the spinner of the propeller, check the proper tightening of the
screws to the wrench. These screws of the hub should be tightened to proper torque, defined in the
installation instructions attached.
A marking paint of all the screw/washer/hub after tightening can be done to help make a visual check
outside of the general maintenance.
- Degradation of material: Check visually the entire propeller (blade root, Inconel leading edge, surface of
the blade, spinner, hub, etc.)
Possible problems:
- Too much clearance in the propeller fixation
- Surface degradation due to dirt or impact / Crack apparent
Corrective actions (depending on the importance):
1. Clean the propeller with the DUC cleaning treatment DUC (ref. 01-80-003)
2. Perform a repair with the DUC repair kit (ref. 01-80-004)
3. Tighten the screws to proper torque with wrench
4. Replace(s) damage component(s)
5. Contact DUC Hélices to define a solution