Preservation

Question 1

What state are immediate readiness reserve aircraft kept in

Answer 1

Engines are preserved IAW AMM

Question 2

When are aircraft deemed to be in short term and medium term reserve

Answer 2

When the aircraft is out of use for less than a month

Question 3

What processes must be carried out on the engine if it is in Short/Medium term reserve

Answer 3

Run engine at least every 14 days
Or
Engine fuel system inhibited
Or
Engine must be turned by hand to operate the system

Question 4

When is an aircraft deemed to be in Long term reserve?

Answer 4

Out of use for longer than a month

Question 5

Why is silica gel placed into long term reserve engines

Answer 5

To absorb moisture and reduce the chance of corrosion

Question 6

How quickly does the WVR bag have to be sealed after silica gel is placed inside the engine

Answer 6

10 minutes

Question 7

What protective materials are used externally for preservation

Answer 7

White spirit - clean fuselage and blow dry with compressed air

Question 8

What is a WVR bag

Answer 8

Water Vapour Resistant bag to keep the engine in during long term reserve

Question 9

What chemical is used internally for preservation

Answer 9

PX24 - stop corrosion
OM 11, OM 13 - mineral oil for inhibiting fuel system
XG275, XG287 - light grease to preserve controls and linkages

Question 10

What colours on a humidity indicator show safe and unsafe

Answer 10

Blue - Safe
Pink - Unsafe

Question 11

What are the 2 transparent panels on a WVR bag used for

Answer 11

Engine identification
Humidity indicator card