A thorough examination should be carried out of a competent person at intervals not exceeding twelve months. This interval should be
less where deemed necessary in the light of service conditions.
Records of such examinations should be maintained.
Chains slings should be thoroughly cleaned so as to be free from oil, dirt and rust prior to examination. Any cleaning method which does not damage the parent metal is acceptable. Methods to avoid are those using acids, overheating, removal of metal or movement of metal which may cover cracks or surface defects.
Adequate lighting should be provided and the chain sling should be examined throughout its length to detect any evidence of wear, distortion or external damage.