SY104 Flashcards
What is the EDM and where is it located?
The Engine Data Manager (EDM) is a computer unit located in the left avionics bay that monitors and processes engine operation data. The EDM performs several engine related tasks. It drives the primary, alternate, and engine/systems displays and illuminates advisory, caution, or warning annunciators when appropriate. The EDM also performs the following non-engine related tasks: fuel balancing, fuel quantity indications, activation of the nose wheel steering annunciator, a display of DC volts, DC amps, hydraulic pressure, cockpit pressure altitude, and cockpit pressure differential.
Gas generator speed (N1) represents?
the speed of the compressor turbine in the gas generator section of the engine.
Propeller operation between 62% to 80% NP is prohibited while on the ground due to
ground resonance.
All Primary Engine Data display is processed by _____ before being displayed on the PEDD.
the PMU
True or False? With the exception of torque, data for the AEDD is not processed by the PMU
True.
At what altitude will cockpit altitude be highlighted yellow in the AEDD?
19,000 feet. Amber CKPT ALT annunciator, master caution, and aural tone will flash.
At what cockpit differential pressure will a red CKPT PX annunciator illuminate, with the MASTER WARN light flash, and an aural tone sound?
3.9 to 4.0 PSI
What does the fuel flow gauge show in the AEDD?
Rate of fuel consumption in pounds per hour.
Where is oil pressure measured?
Oil pressure is measured by a transducer located on the engine oil pressure line downstream of the main oil pump
Where is hydraulic pressure measured?
Measured by a pressure sensor located on the power pack reservoir
What are normal operating ranges for hydraulic pressure?
Normal operating limits for this gauge ranges from 2880 to 3120 psi. If hydraulic pressure falls below 1800 psi or rises above 3500 psi, the display will change color to amber to indicate caution.
Engine/Systems Display provides
oil temperature, oil pressure, hydraulic pressure, DC volts, and DC amps.
What does the fire warning system core element consist of and what does it respond to?
Consists of hydrogen gases and responds to localized heat caused by fire or hot gases.
*Think periodic table of elements: H is the first element and is thus “core.”
What does the fire warning system sensor tube consist of and what does it respond to?
Consists of helium gases and responds to average temperatures for overheat sensing.
The fire warning systems consists of
a core element, a sensor tube, and responder assembly.
