确保飞控舵面的行程范围是无障碍物的。

A.Make sure that the movement limits of the flight control surfaces are free.

B.Make sure that the travel ranges of the flight control surfaces are clear.

C.Make sure that the travel limits of the flight control rudders are clean.

正确答案：B

Shutoff the airflow in the air conditioning ducts to be inspected.

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

The writing rules cover aspects of grammar and style. The dictionary gives the general words that a writer can use.

The symbol means all or most of the rules in that section.

This index helps you find the applicable STE rules related to different specific subjects.

During the APU operation, examine the oil temperature sensor for signs of oil leakage.

The system must be deactivated in order to prevent the thrust reverser from operating accidentally.

Make sure the girt bar is not engaged in the floor-mounted escape slide brackets.

He removed the access panel to see the corroded tube.

It is a must to check the relevant pump when metal chips are found.