Chapter 5 General Reference 113
Hook Inspection
Hooks having any of the listed deficiencies shall be removed from service unless a qualified
person approves their continued use and initiates corrective action. Hooks approved for
continued use shall be subjected to periodic inspection.
a DISTORTION
Bending / Twisting
A bend or twist exceeding 10° from the plane of the unbent hook.
Increased Throat Opening
HOOK WITHOUT LATCH: An increase in throat opening exceeding 15% (Or as
recommended by the manufacturer).
HOOK WITH LATCH: An increase of the dimension between a fully-opened latch and the tip
section of the hook exceeding 8% (Or as recommended by the manufacturer).
b WEAR
If wear exceeds 10% of the original sectional dimension. (Or as recommended by the
manufacturer).
c CRACKS, NICKS, GOUGES
Repair of cracks, nicks, and gouges shall be carried out by a designated person by grinding
longitudinally, following the contour of the hook, provided that no dimension is reduced more
than 10% of its original value. (Or as recommended by the manufacturer). (A qualified
person may authorize continued use if the reduced area is not critical).
d LATCH
Engagement, Damage & Malfunction
If a latch becomes inoperative because of wear or deformation, and is required for the
service involved, it shall be replaced or repaired before the hook is put back into service. If
the latch fails to fully close the throat opening, the hook shall be removed from service or
wired closed (moused) until repairs are made.
e HOOK ATTACHMENTS & SECURING MEANS
If any indication of distortion, wear, cracks, nicks or
gouges are present, unless a qualified person
authorizes their use. (Or as recommended by the
manufacturer).
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