AM.II.K.K8
KnowledgeDerating factors in switch selection.
From the FAA library
- Chapter 4: Engine Ignition & Electrical Systems › Electrical Equipment Installation › Switches
current is known. This selection is essentially a derating to obtain reasonable switch efficiency and service life. Hazardous errors in switch operation can be avoided by logical and consistent installation. Two position on-off switches should be mounted so that ... voltage conditions. The previous discussion of switch ratings is generally applicable to relay contact ratings. Figure 4-125. Switch derating factors…
- Chapter 9: Aircraft Electrical System › Electrical System Components › Switches
Electrical System Components Switches Switches are devices that open and close circuits. They consist of one or more pair of contacts. The current in the circuit flows when the contacts are closed. Switches with momentary contacts actuate the circuit temporarily ... they return to the normal position with an internal spring when the switch is released. Switches with continuous contacts remain in position when activated. Hazardous errors in switch operation can be avoided by logical and consistent installation. Two-position on/off…
- Chapter 9: Engine Fire Protection Systems › Boeing 777 Aircraft Fire Detection & Extinguishing System › Engine Fire Switches
Engine Fire Switches The engine fire panel is in the flight deck on the P8 aisle stand. The engine fire panel has a fire switch for each engine and a discharge light for each fire bottle. [Figure ... engine fire switch has four functions: Gives an indication of an engine fire, • Stops the engine, • Isolates the engine from the aircraft systems, and • Controls the engine fire extinguishing system. The fire switch assembly incorporates a solenoid that locks…