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T.8.3.1 Positive Locking Mechanisms are defined as those which:
a. Technical Inspectors / team members can see that the device/system is in place (visible).
b. Do not rely on the clamping force to apply the locking or anti vibration feature.
Meaning If the fastener begins to loosen, the locking device still prevents the fastener coming completely loose
T.8.3.2 Acceptable Positive Locking Mechanisms include, but are not limited to:
a. Correctly installed safety wiring
b. Cotter pins
c. Nylon lock nuts (where temperature does not exceed 80°C)
d. Prevailing torque lock nuts
Lock washers, bolts with nylon patches and thread locking compounds (Loctite®), DO NOT meet the positive locking requirement.