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Terms in this set (70)
What is the maximum allowable torque?
19,600 inch pounds
How many stages is the compressor?
Where are the acceleration bleed valves and how many are there?
Mounted on the fifth and 10th stages of the compressor. There are eight.
What is the purpose of the acceleration bleed valves?
To prevent the compressor from stalling at low RPM below 94%.
At what stage is the diffuser on the compressor?
What is on the accessory drive?
Speed sensitive Valve, Speed sensing control, engine oil pumps, fuel pumps, Fuel control
When are the engine bleed valves open?
When the engine speed is below 94% RPM
When are the engine bleed air valves closed?
When engine RPM is above 94%
What controls the sequence of starting events by a set of three microswitches?
The speed sensitive control or switch
When are the speed sensitive control microswitches activated?
At Engine speeds of 16%, 65%, and 94%
The speed sensitive switch operates what?
Geneva lock (fuel Shut off valve), Paralleling valve, ignition exciter, fuel enrichment valve, 20% bypass solenoid located in the TD valve assembly
Which combustion chambers contain igniters?
Number two and number five cans contain igniters
When does the secondary fuel pump pressure light extinguish during a normal start sequence?
After 65% RPM
During an engine start what is the maximum time that the starter can be engaged before the switch/button must be released?
The normal ground Idle at RPM is?
94% to 102%
When should positive hydraulic pressure be indicated by during engine start?
When the engine is on speed
What is the maximum TIT during engine start before an over temp inspection is required?
What is the starter duty cycle?
One minute on, one minute off, one minute on, five minutes off, one minute on, 30 minutes off
What is the minimum allowable reduction gearbox oil pressure during low speed ground Idle operations?
During a normal engine ground start, when should you discontinue if there is no ignition?
By 35% RPM there should be ignition
When should you discontinue an engine start for engine or reduction gear box oil pressure?
If no pressure is indicated by 35% RPM
If the secondary fuel pump pressure light illuminates in-flight but extinguishes when the ignition control circuit breaker is pulled, failure of what is indicated?
65% switch in the speed sensitive control
When will the engine low oil quantity light illuminate?
Oil level drops to 4 gallons or less
At 16% RPM the speed sensitive control does what?
Opens the fuel control fuel shut off valve
When the condition lever is moved to feather, the fuel shut off valve is closed how?
Mechanically and electrically
The fuel control meters fuel after sensing what?
Throttle position, RPM, compressor in with air temperature and pressure
Acceleration bleed valves in the fifth and 10th stages of the compressor are used how?
Relieve air pressure to prevent compressor stalls during start and low-speed ground Idle
The engines are normally started with the TD valve switch is in what position?
During start the secondary fuel pump pressure light must illuminate before the engine reaches what rpm?
When down shifting to low-speed ground Idle, the copilot should guard the condition levers, monitor TIT and ground stop the engine if the TIT exceeds what temperature?
The temperature datum control receives TIT information from what?
Where do the aircraft pneumatic systems receive bleed air from the engine?
At the diffuser
The maximum allowable engine oil pressure fluctuation is?
+ or -10 psi
The fire handle should be pulled for?
For fire, nacelle overheat, or visible fluid leak
During engine start on acceleration through what rpm is the ignition system deenergized?
Placing the throttles below flight Idle in-flight may cause?
Immediate loss of aircraft control
The turbine overheat warning lights are located where?
In the fire handles
The procedure for in the nacelle overheat light is the same as for an engine fire light? True or false?
At what temperature with a turbine over heat detectors activate the warning lights?
The master fire warning light will flash for a turbine overheat? True or false?
Where are the thermocouples located?
In the engine turbine inlet
If a low-speed ground Idle button is popped out by throttle movement what should be done?
Return the throttle to ground idle
After the first fire bottle is fired the next step in the engine shutdown procedure is?
Isolate the bleed air for that wing
The start valve open light must extinguish how many seconds after being released?
15 seconds for the light to go out
The start valve open light must illuminate how many seconds after depressing the switch?
Five seconds for the light to come on
The 16% switch in the speed sensitive Control receives power through what circuit breaker?
A good press to test of the start valve open light ensures what circuit breakers are in?
Oil and start control
What is the procedure after going to ground stop in the fuel flow does not go to zero?
Place the condition lever to feather
The first step for a turbine overheat on the ground is?
All throttles to ground Idle
Placing the TD control Valve switch to null does what?
Removes all TD control functions from the engine
Reduction gear box oil pressure is allowed to exceed what psi during start and warm up?
How many seconds after starter engagement must rpm be indicated?
The TD system is in auto, the RPM is above 94%, and the throttles are below 65%. The TD system will do what?
Will limit TIT to 1083° by taking up to 20% of fuel from the fuel control output
A CO approved tactical take off is necessary when?
Refusal speed is less than rotation speed
Approach speed is how many knots higher than threshold speed?
If the controlling critical field length is longer than the runway available and a tactical take off is not authorized, what options are available to the crew?
Download the aircraft, use headwind component in calculations, use with nosewheel steering correction
What does the TD system do?
Provides over temp protection for start limiting, normal limiting and temp controlling
Where does the TD system receive signals?
From the thermocouples
How many thermocouples are there?
What happens during start limiting?
Below 94% the TD system limits TIT to 830 degrees at 50% fuel take
What happens in normal limiting?
Above 94% the TD system limits TIT to 1083 degrees at a 20% fuel take
What is the temp controlling range?
From 65 to 90 degrees throttle movement
How many overheat detectors are in the turbine area?
How many overheat detectors are there in the nacelle?
What happens when you pull the fire handle?
Fuel valves close (dry bay, geneva lock), oil valve, hydraulic valves (2 in horsecollar), bleed air regulator, start control circuits (speed sensitive control), feather prop, arm switch and direct agent valve
During low air density conditions (High temperatures above 28°C and/or high altitude) if the Engine does not stabilize on speed within one minute, the starter button/switch maybe held for how long?
How do you best describe normal bleed?
When the bleed air is used to operate air conditioning and pressurization
When operating the APU with less than 2000 pounds of fuel in the number two tank what should you do?
Boost pump on
The oil sequencing switch on the APU was shut down the unit if the oil pressure drops below what psi by closing what?
4 psi by closing the fuel shut off
The chip detector receives power from what bus?
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