DUC Hélices FLASH-R - Maintenance of 100 Hours or Yearly Maintenance

ISO 9001 : 2015
N° TC EASA : EASA P.038
N° Part 21G EASA : FR.21G.0273
Certified FLASH-R
21/27
Maintenance of 100 hours or yearly maintenance. 7.4.
A propeller general check by the user or a certified aeronautic workshop must be done from time to time. During this check, clean the propeller.
Frequency of checking: 100 hours or yearly
Checkpoints
Control methods
Location
Possible problems
Actions
Fixation
of the propeller
By removing the spinner of the
propeller, check the proper tightening of
the screws with a torque wrench.
Propeller fixation screws, hub
screws
Play/Gap 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. These screws of the hub
should be tightened to proper torque, defined in the
installation instructions attached.
Paragraph 5.3. Setting of the propeller &
Finalization of the installation, step 7.
Degradation of
propeller
Visual check of the propeller (Blade
root, hub, spinner, shielding leading
edge in Inconel …)
Blade root
Big scratch/marking on the blade ring
Stop blade use*. You have to change the blade.
Small scratch/marking on the blade ring
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: Non-deep scratches
(see. paragraph 7.5.)
No mechanic risk, continue to use it.
Blade
Important impact: Crack, deep impact, local
delamination
(see. paragraph 7.5.)
Stop blade use*. You have to change the blade.
Low impact: not deep scratches
(see. paragraph 7.5.)
No significant risk
Propeller adhesive loss
No significant risk, continue to use it.
Complete hub
Crack, delamination
Stop using this part.
Change the half-hub
Surface deformation
Stop using this part.
Change the half-hub
Hub screws
Nylstop self-locking nut is damaged
Stop using this part.
Change the Nylstop self-locking nut
Fixation
of the spinner
Check visually the correct fixing of the
spinner and its fixing bolts
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.