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Start Procedures for turbine engines can be found?
Airframe Manufactures Manual
Controls feather , min and max rpm?
Controls reverse , beta , power range?
Controls Cut-off , low and high idle?
Define hung start
No acceration during start
Define hot start
Exceeding maximum temperature limits on start-up
Dry motoring run ?
No fuel ,no ignition , cranking starter
Purpose of a dry motoring run?
To remove trapped fuel or fuel vapor in engine
Would the boost pump be on or off during a dry motoring run?
Why is the boost pump on during the dry motoring run?
To lubricate engine driven fuel pump
Why would you choose to leave the boost pump off while doing a dry motoring run?
If you have reason to believe fuel is leaking past the fuel shut off
How long can you run the fuel pump with the boost pump off ?
10 hours , log time and replace fuel pump when total tome exceeded
Wet motoring run?
fuel on , ignition off, cranking starter
Purpose of a wet motoring run?
to test or do checks on the fuel system
What must be done after a wet motoring run , before starting ?
Dry motoring run
When first starting what are the 2 gauges to watch?
- N1 speed and oil pressure
- (then ITT after fuell is added)
At what n1 speed is the fuel lever moved from cut off?
[Starting] N1 reached and fuel being introduced. How long to wait for a ITT rise ?
If no rise what is done?
- 10 seconds
- Abort start if longer
- dry metering run to remove any fuel before restart
PT6 self sustaining speed?
When starting a PT6 with glow plugs what must be done?
at 12% N1 , glowplugs 5 seconds , then add fuel
When starting PT6 what is the prop angle set to?
What "tool" is used on the KingAir PT6 when setting the max NG speed (topping)?
Part Power trim stop
When topping max NG with a part power trim stop, what is the desired rpm to see?
How do you adjust the minimum fuel flow on the PT6?
Unhook PY and compare Ng speed to chart , set with the adjustment screw
Minimum fuel flow adjustment screw moves what?
How many clicks each direction can the acceleration dome be turned?
3 clicks each way
Procedure for checking acceleration ? (engine is already warm)
- fuel lever - ground idle
- power lever - max power
- mark power lever position then
- move power lever to 64% Ng
- wait 1 second
- Bring power back to original position and time acceleration -- compare to chart
What reaon would you adjust the minimum fuel flow setting?
When starting the PT6 what are the 6 parameters that must not be exceeded?
- Oil Pressure
- Oil temperature
Before starting turbine engine without ground cart , what must be checked?
Battery voltage to ensure smooth start
2 things tracked in between overhauls for limits?
Hours and Cycles
approaching hot start - what do you do?
- Fuel cut off
- ignition off
- continue cranking
What position is the bleed valve on startup?