DUC Hélices FLASH-R - Regular Maintenance (by the User)

Certified FLASH-R
20/27
Regular maintenance (by the user) 7.3.
For a safety use of the FLASH propellers, it is necessary that the user performs regular maintenance to detect any abnormalities.
Frequency of checking: Each pre-flight
Checkpoints
Control methods
Location
Possible problems
Actions
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.
Propeller fixation screws
Clearance in the propeller fixation
Stop propeller use and apply these corrective actions
Check screws.
If necessary, change the propeller fixations screws & Check
all the mounting to avoid problems.
Degradation of
propeller
Check visually the entire propeller
without dismantling (blade root,
Inconel leading edge, surface of the
blade, spinner, hub, etc.)
Blade root
Big scratch/marking on the blade
Stop blade use*. You have to change the blade.
Small scratch/marking on the blade
If small marking without deformation, continue to use it.
Crack
Stop blade use*. You have to change the blade.
Shielding leading edge in
Inconel
Lifting
Stop blade use*. You have to change the blade.
Significant impact: deep scratches, break,
deformation
(see. paragraph 7.5.)
Stop blade use*. You have to change the blade.
Low impact: not deep scratches
(see. paragraph 7.5.)
No mechanic risk, continue to use it.
Blade
Significant impact: deep scratches
Local delamination
(see. paragraph 7.5.)
Stop blade use*. You have to change the blade.
Low impact: not deep scratches, small scratch,
small impact
(see. paragraph 7.5.)
No significant risk
Propeller adhesive loss
No significant risk, continue to use it.
Fixation
of the spinner
Check visually the fixation screws of
the spinner
Spinner fixation screws
Play/Gap in the spinner
Check the screws. If necessary, change it.
Tighten the screws to proper torque with wrench
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.
* Nota: All the blades are balanced together. When a blade is changed, the blade has to be balanced to keep this balancing. For this, contact the DUC Hélices company.