修订意味着对现有手册中的信息进行修改。

Drains let fuel in the vent system return to the tanks.

The microprocessor cards are interchangeable.

To obey the regulations is very important for aircraft maintenance activity.

The system to be tested operated abnormally during last flight leg.

The next check interval is based on the inspection results of this time.

Remove the remaining sealant.

Open the circuit breaker.

Do not use other verb tenses that are not approved.

Do an overhaul of the No. 2 engine.

Manually override the start sequence.