990、Such tests or checks will vary in complexity according to the conditions. 这种测试或检查的复杂性将根
据条件而异。

285、 The surge tank drain check valve also prevents fuel flow from main tank 1 and main tank 2 to the surge
tank.

284、 Use the manual control in an emergency.

283、If possible, supply sufficient examples from your technical documentation to support your proposal.

282、 Set the applicable L PACK switch or the R PACK switch, on the P5-10 air conditioning panel, to the

281、 The ventilation system uses differentia pressure to pull air out of the airplane

280、 Put a transparent sheet of plastic on the surface.

279、 He removed the access panel to see the corroded tube.

278、Engine Controls and Instruments include, definitions, descriptions or explanations of the following terms
or components. The definitions, descriptions land explanations provided are examples. Those used in a
particular Handbook should be appropriate for that particular airplane of installation.

277 、 Airline operators are encouraged to evaluate their particular 737NG operating environment,
accompanied with debris findings at time of leaning to identify and implement(执行)the most effective and
economic maintenance interval.
鼓励航空公司运营商评估其特定的 737NG 运行环境,并在倾斜时发现碎片,以确定和实施最有效和经济的
维护间隔

276、Provide ventilation for lavatories and galleys.