644、 如果过滤器发生堵塞，应送去实验室分析污染情况

844、If the format parameter or rule is inappropriate to the type of airplane, equivalents likely to achieve the same Objectivesmay be used

843、If the error is more than 5deg, calibrate the compass.

842、If possible, always tell your reader what can occur if the safety instruction is not obeyed.

841、Hydraulic fluid is dangerous for your eyes.

840、Extend and retract the actuator through three full cycles.

839、English is not often the native language of the readers of technical documentation

838、Emergency Procedures and other pertinent information necessary for safe operations shall be provided for emergenciespeculiar to particular airplane design, operating or handling characteristics.

837、EGT shows only when the EEC has electrical power.

836、Do the related troubleshooting procedures.

835、Do not use metallic objects which could nick or damage the uplock spring surface