Showing content mapped to EASA Part-66. Change authority in the header.
Torque loading
Always use a calibrated torque wrench. Apply torque smoothly to the specified value in the AMM. Never use a torque wrench to break out a fastener. Convert units carefully: 1 Nm ≈ 8.85 lb·in.
Locking devices
Split pins, tab washers, wire locking (safety wire) and self-locking (nyloc/all-metal) nuts. Wire locking always in the direction that tends to tighten the fastener.
Rivets
Solid rivets (AN/MS types, driven with a bucking bar) and blind rivets (Cherry, pop). Diameter ~3× sheet thickness; length ~1.5× diameter plus grip length. Countersink or dimple for flush finish.
NDT overview
Non-destructive testing: visual, dye penetrant (open-surface flaws), magnetic particle (ferrous, surface & near-surface), eddy current (conductive materials, cracks), ultrasonic (internal flaws) and radiographic (internal structure, needs safety controls).