Module 17.7 Propeller storage and preservation

Question 1

Where would the storage, preservation and de-preservation procedures be found for installed propellers?

Answer 1

AMM

Question 2

Where would the storage, preservation and de-preservation procedures be found for uninstalled propellers?

Answer 2

Propeller Maintenance Manual

Question 3

What is short term storage for propellers?

Answer 3

Up to 3 months

Question 4

What is long term storage for propellers?

Answer 4

Up to 3 years

Question 5

For periods up to 3 months, how must wooden fixed pitch propellers be stored?

Answer 5

Horizontally stored to allow for equal moisture distribution. Inspected for damage and cleaned with a mild soapy solution at regular intervals.

20C clean and warm

Question 6

What must be done to deterioration to prevent moisture ingress?

Answer 6

Restored

Question 7

Variable pitch propeller pitch change mechanisms need to be what?

Answer 7

Run once to circulate the oil

Question 8

For periods up to 6 months, what must be done to the pitch change mechanism if the aircraft is still on the wing?

Answer 8

Over 3 months, Pitch change mechanism must be flushed again with inhibiting oil and then covered with wax paper

Question 9

What must installed propellers be treated with to prevent corrosion?

Answer 9

Lanolin or anti-corrosion

Question 10

How must installed metal propellers be kept?

Answer 10

Upright with hub supported in a mandrel

Question 11

What must be done to variable pitch propellers prior to removal?

Answer 11

Exercised

Question 12

Should there be oil kept in the pitch change mechanism if the propeller is uninstalled?

Answer 12

No

Question 13

What must be cleaned, coated in lanolin and wrapped in waxed paper?

Answer 13

oil transfer tubes and the propeller attachment parts

Question 14

If a wooden propeller has an automatic pitch change mechanism, the hub must be filled with what?

Answer 14

Oil

Question 15

How often must the wooden propeller be turned to ensure the internal surfaces are coated with oil?

Answer 15

Every 2 weeks

Question 16

What is the one exception for storing metal blades for up to 6 months?

Answer 16

If the blades have pre-loaded bearings, the blades must be rotated to prevent brinelling.

Must be done at the 6 months point

Question 17

What must be done to the bearings at the 12 month period?

Answer 17

Take them out and inspect them

Question 18

For storage over 12 months, what must be done every 12 months?

Answer 18

Re-inhibit

Question 19

What must be done to the propeller at the 3 year period?

Answer 19

Sent for overhaul

Question 20

If the propeller is dismantled and remains in its original manufacturers’ packing it does not require what?

Answer 20

Re-inhibiting every 12 months

Question 21

Long-term Preservation of Uninstalled, Dismantled, if the bearings are in a pre loaded condition what must be done?

Answer 21

6 month exercising and 12 month inspection