991、所有页面上必须有制造商的报头,出版物标题,飞机型号,发行或修订日期。
答案解析
解析：
相关知识点：
荐方法减误差告设备况
相关题目
497 、 Utilizing an airplane as intended by the manufacturer, combined with sound inspection andmaintenance practices/ , forms the/ basis for assuring the airplane remains airworthy and safe to operate.
496、你有权免费复制或出版本文件或其任何后续修改或修订的全部或部分内容。
495 、Install packing and backup rings on bearing. Slide bearing into cylinder until bottomed. 在轴承上安装填料和支撑环。将轴承滑入气缸直到底部。
494、室外空气温度是自由空气静止温度，从飞行温度指示或地面气象源获得，并根据仪器误差和压缩系数效应进行调整。
493、Maintain the power lever at the "start" position until the specified minimum oil temperature is reached. 保持电源杠杆在“开始”位置，直到达到规定的最低油温。
492、One thirty-second is an example of fractions.
491、This Specification refers to various FAA regulations.
490、两台发动机泵的吸入管路中有电动阀。
489、The cover title and applicable airplane designation shall be prominently displayed on the cover or spine(or both) of the Handbook.
488、在两个副翼后部有调整片。
