518、Each handbook shall have a log of revisions or effective pages.
答案解析
解析：
相关知识点：
手册修订或有效页记录
相关题目
970、put the end of rod that has a thread in the fitting
969、Put the aircraft back to its initial configuration.
968、 procedures shall be provided for making an emergency descent
967、 Procedures shall be provided for all airplanes for all cases of engine failure during takeoff and in flight.
966、Procedures for handling malfunctions or other abnormalities that are not of emergency nature, orinvolve a potential emergency that may be deferred may be included in this Section. 处理非紧急性质的故障或其他异常，或涉及可能被推迟的潜在紧急情况的程序，可列入本节。
965、prevent movement of the components when you repair the unit
964、 Prepare the airplane for prolonged out of service care
963、Preparation of Technical Data for certain chapters in the Maintenance Manual require joint contributionand close coordination between the manufacturer of the air frame and the manufacturers of various othercomponents.
962、 Polish the surface with a soft cloth until it becomes shiny.
961、 Optional information including (but not limited to) the rationale utilized to select CAPS -how the CAPrequirements were determined
