819.Once designed and approved, the establishment of thorough maintenance procedures is a must. 一旦设计和批准，建立彻底的维护程序是必须的。

669、There is sufficient oil in the tank.

668、The wording given in the approved examples is not mandatory. It shows only one method to write the same informationwith approved words You can frequently use different constructions with other approved words to say the same thing.

667、The Type Certificate will not be issued to the applicant unless the findings are completely settled.

666、The torsion link assembly can transmit torsional loads from the axle to the shock strut

665、The technical reference document contains a list of necessary document, such as Service Bulletin, Service Letter and etc.

664、The system is used to indicate the quantity, temperature and pressure of the oil.

663、The Specification contains little new material or novel approaches.

662、The second method does not require pressurization of the pneumatic crossover manifold, but utilizes an external airsource connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance.

661、The schematic diagrams should include generators, tanks and reservoirs that are considered to be the starting points ofthe flow

660、The repair limits are not given because special equipment is necessary.