Aircraft locking methods

What is the sole main purpose of a fastener locking device?

• To lock passengers out so they cannot enter the aircraft

• To prevent fasteners vibrating loose

• To lock a fastener as there is no need for torque loading

What Airbus standard would you refer to in relation to split pins?

• ABD002

• ABP 6-3205

• S63

What nut type is used with split pins?

• Nylock

• Castellated

• Plain

Can you draw a castellated nut?

When trimming the split pin to size I should.......