4.6 Ultra-High Usage
For WAVE units exceeding 4000 lifts per year, this section provides additional inspection
criteria.
Pre-use checks
i. Check load plate for wear, cracks, nicks, gouges, corrosion, and distortion of plate or
holes.
ii. Check node plate weldment for cracks, nicks, gouges, corrosion, and distortion of
plate or holes, paying particular attention to the welds.
iii. Check the passenger restraints folding seat support assembly, seat mounting cross
member, Cantilever Weldment, sliding sleeve weldment for cracks, distortion, paying
particular attention to the welds.
Visual inspection
i. In addition to the guidance, the node plate welds should be visually inspected for
cracks.
ii. In addition to the guidance, the passenger restraint springs should be visually
inspected for cracks
iii. In addition to the guidance, the foot mounting plate should be visually inspected for
cracks and distortion.
iv. In addition to the guidance, the floor grating should be visually inspected for sign of
distortion, cracking, corrosion or splinters. The penny washers should also be visually
inspected for signs of distortion or deformation.
Examination
i. In addition to the guidance, the load plate for cracks and distortion. Particular
attention should be paid to the holes in the load plate.
ii. In addition to the guidance, the welds on the lower node plate should be inspected
using the dye penetrant technique for cracks. The welds on the upper node plate
should be visually inspected for cracks.
In addition to the guidance, the buoyancy panels should be removed and the pillar strut
weldment should be visually inspected for cracks and distortion. Particular attention should
be paid to the welds, holes and the inner ends of the pillar strut where they join the node
weldment. The floor grating should be visually inspected for sign of distortion, cracking,
corrosion or splinters. The welds should be visually inspected around the mounting plates
for cracks.
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