Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
|
Designation of engine |
T56-A-15 |
|
|
Major sections if the engine |
- Power Section - Torquemeter assembly and tie struts - Reduction Gearbox |
|
|
Purpose of compressor bleed valves |
- unload the compressor on start up and acceleration - prevent bogdown and overtemp during deceleration |
|
|
What % RPM do the compressor bleed valves close and what controls them? |
- 94% RPM - controlled by the speed sensitive valve. At 94% 14th stage air is directed over the compressor valves on the 5th and 10th stages keeping them closed. |
|
|
What is on the front face of the accessory housing? |
- Power Section Oil pump - Power Section Oil filter - Speed sensitive switch - Speed sensitive valve |
|
|
Accessories driven by the reduction gearbox |
- Generator - Hydraulic pump - Reduction Gearbox oil pump - Starter - Tacho-generator |
|
|
What torque does NTS operate at? |
1260 +/- 600 |
|
|
Purpose of the Safety Coupling System? |
To prevent excessive drag if the NTS should fail. Eliminates dangerous situation in the event of NTS failure by decoupling the power section from the reduction gearbox should negative torque exceed -6000inlbs |
|
|
Prop break release |
During engine start torque from the starter if felt through helical splines and holds the cones apart until oil pressure is sufficient. |
|
|
Below what temperature can nacelle heat be used? |
-18°C or below |
|
|
If the oil cooler flap is fixed open what component controls oil temp and to what temp? |
A thermostatic bypass valve bypasses oil around the oil cooler matrix when the oil temperature is below 68°C |
|
|
What is the significance of the 9-30° coordinator range? |
Low Speed Ground Idle |
|
|
What happens at crossover? Temp and change |
- Switches from temp limiting to temp controlling - TIT should be 820°C+/-20 |
|
|
Fire Handle 10 things |
- Fuel shut off valve on FCU closes - Oil shutoff valve closes - Firewall hydraulic pressure shutoff valve closes - Firewall hydraulic suction shutoff valve closes - Firewall fuel shutoff valve closes - Engine bleed air shutoff valve closes - Engine start circuit is de-energised - Propeller electronically feathers - Extinguisher directional valves positioned - Extinguisher agent discharged switch armed |
|
|
What happens during start cycle at 16% RPM? |
- Fuel shutoff valve in the FCU opens - Fuel enrichment valve (if selected) opens - Parallelling valve closes - Drip valve is energies closed - Ignition energized |
|
|
4 variables the FCU will meter fuel for? |
- Engine speed - Throttle position - Compressor inlet temperature - Compressor inlet pressure |
|
|
Purpose of the low speed ground idle? |
- Reduce noise - Reduce thrust - Reduce fuel flow |
|
|
What setting is the TD in whilst in Low Speed Ground Idle? |
- below 94% it is in start limiting, therefore is limiting TIT to 830°C and max take is 50%. |
|
|
What is the TIT through crossover? |
820°C +/- 20 |
|
|
What indications will you get on the EIDS if a variable goes out of limits? |
- Master caution - Red box around exceeded variable - Pointer turns red |
|
|
With the EIDS in reversionary mode, what does the ADV flag mean? |
- Has detected an out of limits event has occured on a display not currently being viewed. |
|
|
What systems can be controlled by ice detection system? |
- Prop anti-ice - Engine inlet air duct anti-ice - Radome anti-ice |
|
|
Limitation for ice detection test switch |
- Hold for 5 seconds max followed by 5 minutes cool down. |
|
|
Indications of a nacelle overheat |
- Nacelle O/H CAWS annunciator - Master warning - Fire Handle illuminates solid red |
|
|
List of emergencies that will result in engine shutdown at pilots discretion. |
- Engine fire - Nacelle O/H - Turbine O/H - Uncontrollable power - Uncontrollable rise in oil temp - Uncontrollable rise in TIT - Uncontrollable decrease in oil pressure - Unusual vibration or roughness - Certain prop malfunctions - Throttle control failure - Excessive fluid leak |
|
|
Power supply for the Fire Extinguishing system |
28V BATT BUS |
|
|
What is the function of the oil pressure switch on the APU? |
- Controls the fuel shutoff solenoid valve and ignition - Ensures APU will not start without sufficient oil pressure - Ensures APU will shutdown automatically if oil pressure drops below 4psi |
|
|
What does the APU accessory cooling fan do? |
- Provides cooling for the generator and oil cooler. - Drawn through an inlet duct at the back of the APU |
|
|
Indications of a fire in the APU? |
- Master warning - Fire annunciator on the CAWS - APU fire Handle flashing red - Horn will sound |
|
|
APU start limits |
- 1 min on -> 6 min off - 1 min on -> 6 min off - 1 min on -> 30 min off |
|
|
APU max EGT |
- 620°C for 15 seconds or 663°C |
