The OEUs change 115v AC from the main bus to 5v AC for row call lights and 12v AC for the reading lights.

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

Adjust the potentiometer until you do not hear a hum from the loudspeaker.

If one or more blades are missing, make an entry in the engine logbook.

Electronic devices that are used in nearly all aircraft systems are the computer for system control and monitoring and the control inputs and indications in the cockpit and sensors throughout the whole aircraft.

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

In some cases, the Specification is used to prepare a Continuing Airworthiness Program for acceptance by an airworthiness authority other than FAA.

These tests should require no special equipment or facilities other than that installed on the aircraft and should be comparable to the tests performed by the flight crews.

The emergency procedures check list should be in concise, abbreviated form designed to remind pilots of items to check without providing details concerning the operation of any system.

The function and operation of each unit in the system should be described as well as the location of the units.

The removal/installation portion shall state clearly the sequence of steps required to remove and reinstall a component or unit, along with precautions to be observed.