17.7

Question 1

Preservation and de preservation procedures are done for what type of propellers?

Answer 1

Installed propellers
Info FOUND IN AMM

Question 2

Where is information found for preservation of uninstalled propellers?

Answer 2

Propeller maintenance manual

Question 3

4 storage periods?

Answer 3

3 months-short term
6 months- long term
12 months- long term
3 years- long term

Question 4

Wooden fixed pitch propellers should be placed in horizontal position why?

Answer 4

To ensure there is even moisture distribution

Question 5

Storage conditions for propellers?

Answer 5

Ventilated
Clean
Warm
Dry
Dark
Free from corrosive vapours

Question 6

What temperature is ideal storage temperature?

Answer 6

10-20 degrees

Question 7

Variable pitch propellers pitch change mechanisms should be exercised why?

Answer 7

To circulate the oil prior to engine shut down

Question 8

If propellers are stored for more than three months then what mechanism is inhibited?

Answer 8

Pitch change mechanism
Covered in waxed paper

Question 9

For storage up to three months, if a propeller has an automatic pitch change mechanism the hub should be filled with what?

Answer 9

Oil

Question 10

For storage up to 3 months the propellers should be turned every what?

Answer 10

2 weeks

Question 11

Metal propellers should be stored in what position?

Answer 11

Upright position

Question 12

For short term storage, the external surfaces must be coated with what?

Answer 12

Lanolin or an approved corrosion inhibitor

Question 13

For short term storage, what parts also go into storage with propeller?

Answer 13

All parts used to secure propeller to engine
Including:
Oil transfer tubes
Retaining nut assemblies
Location cones

Question 14

For storage up to 6 months, if the propeller blades have pre loaded bearings, the blades are rotated to prevent what?

Answer 14

Bearing brinelling

Question 15

For storage up to 12 months, blades are exercised how often?

Answer 15

Exercised every 6 to 9 months

Question 16

For storage up to 12 months bearings are removed for what?

Answer 16

Brinelling checks

Question 17

For storage OVER 12 months, the propeller will require re-inhibiting at what point?

Answer 17

At each 12 months point

Question 18

For storage over 12 months at the three year stage the propeller must go where?

Answer 18

Be sent for overhaul

Question 19

All parts held in storage require what?

Answer 19

An EASA form 1- certificate of conformity
And valid CERTIFICATE OF RELEASE TO SERVICE