ED Decision 2013/011/R
(a) Fasteners (e.g. bolts, pins, screws, karabiners) used in the structure conform to approved specifications.
(b) Locking methods are established and documented.
(c) Unless a joint is free from relative movement, secondary locking means are used.
(d) Self-locking nuts are not used on bolts that are subject to rotation in service.
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