SYS - Propulsion 2

Question 1

Location of Engine Data Manager (EDM)?

Answer 1

Right avionics bay

Question 2

Main function of the EDM? (2)

Answer 2

• Monitors engine operating parameters

- provides discrete alerts to each IAC

Question 3

Non engine related functions of the EDM? (7)

Answer 3

• fuel balancing
• fuel quantity indication
• Display of DC Volts, DC amps, Hyd pressure, cockpit PA, and cockpit differential pressure

Question 4

Where is the Crew Alerting System (CAS) displayed?

Answer 4

• bottom portion of the EICAS

Question 5

What does the CAS display? (4)

Answer 5

• warnings - red
• cautions - Amber
• status - green
• conditions - white

Question 6

When will the IOAT digital readout turn to Amber?

Answer 6

• when IOAT is 3deg C or less and the Probes Anti-Ice is not ON.

Question 7

What three colours can the DC voltage readout be?

Answer 7

White, Amber, and red.

Question 8

When does the cockpit altitude readout turn to a,bear along with master caution?

Answer 8

Above 19000ft cabin altitude

Question 9

When does cockpit differential pressure turn red along with master warning?

Answer 9

• when exceeds 3.9-4 spider

Question 10

Where in the engine is N1 measured?

Answer 10

The speed of the compressor turbine measured by a pulse sensor in the accessory gearbox

Question 11

What is ground resonance for the propellor?

Answer 11

Self excited vibration caused by dynamic coupling between specific frequency ranges of the propellor and the ground

Question 12

RPM range for ground resonance and how displayed on EICAS?

Answer 12

• 62-80%, white text on a red background

Question 13

Normal operating range of oil pressure?

Answer 13

90-120psi

Question 14

Where is hydraulic pressure measured?

Answer 14

• on the power pack reservoir

Question 15

What two types of temperatures does the fire warning system measure?

Answer 15

• average

- discrete

Question 16

The core element is filled with _________ gas and responds to ___________ heat caused by ______________ .

Answer 16

• Hydrogen gas
• localised heat
• fire or hot gases

Question 17

The sensor tube is filled with __________ gas and responds to ___________ temperatures for ___________ sensing.

Answer 17

• Helium
• average
• overheat

Question 18

How does the sensor tube detect average temperature overheat?

Answer 18

Helium expands and increases pressure triggering an overheat/fire signal.

Question 19

How does the inner core sense a hot fire or got gas?

Answer 19

As the core element temperature increases it releases hydrogen into the sensor tube. This hydrogen mixes with the helium, increasing pressure and setting off the overheat/fire trigger.

Question 20

How many fire sensor tubes?

Answer 20

Two

Question 21

How test each fire sensor system?

Answer 21

With the fire warning system test switch - 1 or 2 position.

Question 22

What does the firewall shutoff handle close? (3)

Answer 22

• hydraulic fluid
• fuel to the engine
• bled air from the engine