"Unscheduled Servicing" includes instructions such as those for ice and snow removal from parked aircraft, preoiling of radial engines after extended shutdown, etc.

Put your hand on the fan to feel for vibration. If you feel vibration, the fan is on.

Make sure the temperature remains constant across the surface of the laminate.

Contact Liaison Engineering if there are questions about the applicability of this requirement.

Make sure the L PACK and R PACK switches on the P5-10 Air Conditioning Panel are in the OFF position.

If one of the compounds that follow is applied to the fastener, use the torque value for “lubed fastener.”

Open one of the cabin entry doors to make sure that the cabin is not pressurized.

Pressure surges and vibration can cause wear on the hoses.

Monitor the speed indication continuously until the end of the test.

During the soldering procedure, use a protective shield.

There must be a good airflow in the work area.