Systems Flashcards
What is the wingspan of the T-38
25 ft 3 in (25.25 ft)
What is the gross weight of the T-38
12,800 lbs
Sea level, standard day, static thrust for each installed engine is ___lbs at MIL and ____lbs at MAX
2200 / 3300
The exhaust gas sensing system (T5) varies the nozzles to keep the EGT between ___ and ____ at both MIL and MAX
630 / 650 Celcius
Momentarily pushing the start button arms the ignition circuit for approx. ___ seconds
30
Throttle bursts are defined as ___
throttle movement from idle to MIL in 1 second or less
Avoiding throttle bursts helps to minimize ___
the possibility of compressor blade failures
The Electronic Engine Display (EED) is powered by ___
right essential DC power
Which sensors on the EED require AC power?
Oil pressure, fuel flow, and fuel quantity
Normally which EED operates as the Master and which EED operates as the Slave?
FCP EED is the Master, RCP EED is the Slave
Erroneous or fluctuating engine sensor data on the Master EED should be confirmed by the other cockpit by ____
switching the Master/Slave relationship on the EED
When the EED is powered either ON or OFF, the EED momentarily activates the ___ caution light.
FUEL LOW
If the ambient temperature is below 32*F, the EED may take up to ___ minutes to turn on.
5
The digital readout of the Engine Tachometer (RPM) is from ____ to ______ rpm in ___% intervals
0% to 110% RPM in 1% intervals
The digital readout for exhaust gas temperature is from ___ to ___ *C in ___ degree increments
0 to 1200 *C in 5*C increments
If an EGT exceedance of greater than 650*C but not greater than ___*C occurs without an EGT OVERTEMPT CAUTION, the mission may be continued
665*C
THe digital readout for Nozzle position on the EED is from ___% to ___% in ___% increments
0-99% in 1% increments
The digital readout for Oil Pressure is from ___ to ___ psi in ___ psi increments
0-80 psi in 1 psi increments
Under what two conditions would the Oil Pressure latch
- Oil pressure <5 PSI for 30 seconds continuously with weight-off-wheels 2. ≥56 PSI for 30 seconds continuously with weight-off-wheels
For both the left and right Fuel Flow indicators to operate normally, the FF power supply requires ___. If this power is absent, both the left and right FF indicators will display ___.
DC power from the left essential DC BUS. 0 pph
Does the increased Fuel Flow due to Afterburner operations get provided or displayed to/by the EED?
No
The FUEL LOW caution light illuminates when either fuel tank registers ___lbs or less for ___ seconds or more.
250 pounds or less for 7.5 seconds or more
The fuel quantity imbalance indicator follows what schedule (i.e. when does it display an imbalance, and when does it turn red?)
No display: 0-50 pounds White: 60-190 pounds Red: ≥200 pounds
Turning on pitot heat or exterior lighting (i.e. Landing/Taxi and Formation Lighting) may cause up to ___ pound change in displayed fuel quantity depending on internal/external power sources
+/- 100 pounds
Changes of greater than +/- 100 pounds are indicative of ____.
Fuel quantity probe failure
If an EED overtemperature occurs, EED brightness is reduced by ___% (Day mode only), and “EED HOT” is displayed in the EED message window.
50%
What function does the main fuel control perform?
- Regulates engine speed based on the selected throttle setting 2. Manages main engine fuel flow at all points of engine operations such as start and rapid throttle movements to ensure consistent thrust levels 3. Provides protection from over-temperatures, engine stalls, and flameouts 4. Limits main engine fuel flow at low throttle settings to ensure proper fuel-air ratios for low power and engine restarts during flight 5. Correctly positions the compressor inlet guide vanes and air bleed valves
What indicates “OFF” before an engine start with battery power?
L/R Oil pressure L/R fuel flow L/R fuel quantity Total fuel quantity
An airframe-mounted gearbox for each engine drives an associated ___ and ___.
AC generator and Hydraulic pump
Gearbox shift occurs between what RPM range?
65-75%
What is the capacity of the oil system in each engine
4 quarts with 1-quart expansion space
Oil consumption engine operation and overboard venting caused by condensation and aerobatic flight should not exceed ___ ounces/hr
6 ounces/hr
A compressor stall at a low altitude can be recognized by what indications?
A pop or bang followed by an audible buzzing sound and vibration, accompanied by a rapid RPM drop and high EGT.
A compressor stall at a high altitude can be recognized by what indications?
An audible chug or pop accompanied by a rapid RPM drop and decreasing EGT.
In both cases, what actions may clear/recover the compressor stall?
Rapidly retarding the associated throttle to IDLE and pressing the ENGINE START button
Normally, fuel flow from the boost pumps is sufficient from sea level up to ___MSL, however it is only guaranteed up to ___MSL. Flameouts have occurred as low as ___MSL.
25,000 MSL 6,000 MSL 7,000 MSL
L/R FUEL PRESS lights may be an indication of boost pump failure if crossfeed is ___, the corresponding fuel shutoff is in ___, and the throttles are out of ___.
OFF NORMAL OFF
Placing either fuel shutoff switch to CLOSED shuts off fuel flow to that engine in approx. ___ second(s)
1 second
The fuel quantity indicators should be monitored to ensure the two fuel systems are within ___ lbs of each other to ensure aircraft center of gravity (cg) is within limits
200 lbs
If either fuel system has less than ___ lbs of fuel, the surface of the fuel falls below the boost pump upper inlet and boost pump output is reduced by ___%
650 lbs 40%
Taxi operations with less than ___ lbs in either system can cause cavitation of the boost pump of that system, resulting in engine flameout at low power settings.
150 lbs
During single-engine, low fuel operations, and less than 250 lbs in either system, place both boost pumps to ___ and the crossfeed switch to ___ to allow the engine to be fed by both systems simultaneously.
ON ON
The DC power system, consisting of the right and left DC buses and the non-essential DC bus, is powered by two ___-amp DC TRU’s or one ___ volt battery
50 amp TRU 24 volt battery
The two AC generators come online when the respective engine RPM accelerates to approx ___%
43-48%
Both generators operate at ___ volts, providing three-phase AC power
115(+/-2) volts
Should one generator fail, automatic transfer of the electrical load through the interaction of both protection panels may take up to ___ seconds.
2.5 seconds
The static inverter converts DC bus power to ___ volt AC power.
115 volt
Aircraft hydraulic power supply systems include a ___ psi utility hydraulic system and a ___psi flight hydraulic system.
3000 psi 3000 psi
A FLIGHT/UTILITY HYDRAULIC light illuminates for what two reasons?
- Low hydraulic pressure (below 1500 psi) 2. Hydraulic fluid overtemperature
A FLIGHT/UTILITY HYDRAULIC light will go out if:
- The hydraulic pressure is restored to 1800 psi or higher 2. The hydraulic temperature cools down below overheat threshold conditions
Normal landing gear extension/retraction takes approx. ___ seconds
6 seconds
The landing gear warning system is activated when the landing gear is not down and locked and what three conditions exist:
- Airspeed is 210 KCAS or less 2. Altitude is 10,000 ft MSL or below 3. Both throttles are below 96% RPM
With DC failure, the RCP ___ gear light does not illuminate due to gear relay wiring
Nose gear
The landing gear alternate extension handle must be pulled to approx. ___ inches. Extension of the main and nose gear required approx ___ seconds, but can take up to ___ seconds.
10 inches 15 seconds Up to 35 seconds
After an alternate gear extension, what system is unavailable until the system is re-activated?
Nosewheel steering
Under what two conditions is NWS automatically turned off?
- Selecting MAX on one/both throttles 2. When A/C weight is not on the nose wheel
With a hydraulic failure, will you lose braking action? Why or why not?
No The brakes are powered by a separate, completely self-contained hydraulic system
When the nose gear is extended 3/4 or less, the rudder is limited to ___ degrees from neutral in either direction
6 degrees
When the nose gear is extended to more than 3/4, the rudder is limited to ___ degrees from neutral in either direction.
30 degrees
The electrical RUDDER TRIM knob on the YSAS control panel provides the means of trimming the rudder ___ degrees in either direction, provided the DAMPER switch is in the YAW position
2 degrees
If one flap motor fails, will you have the use of both flaps? Why or why not?
Yes The flaps are interconnected by a rotary shaft Flap actuation will take longer than usual with one motor inoperative
What purpose does the Flap-Horizontal Tail (Flap-Slab) interconnect system provide?
Compensates for aerodynamic changes caused by flap actuation to provide the same aircraft handling characteristics, regardless of flap position
Intermediate speed brake positions can be obtained by ___.
positioning the switch to the desired direction of movement then returning to the HOLD (center) position.
The cabin pressure regulator maintains what schedule for cabin pressurization?
- Below 8,000 ft MSL = 0 PSI (ambient) 2. 8,000 - 23,000 ft = 8,000 ft +/- 1,000 ft 3. Above 23,000 ft = 5 psi above ambient (+/- 2,000 ft)
What are the two indications of an air compressor turbine failure?
Vibrations of the A/C system accompanied by fumes/odors from the A/C system
At engine speeds of 94-98% RPM, and the ANTI-ICE turned to MAN ON, an increase of approx. ___ degrees C of EGT is considered normal
15 degrees Celcius
With ANTI-ICE enabled, a loss of 180 (+/-10) lbs of thrust is lost. This results in approx. ___% at MIL power and ___% at MAX power.
8.5% at MIL 5.5% at MAX
The YSAS may disengage, an ADC PFL generated, TAS may not be available and all AoA lights may illuminate if the pitot heat is turned on during ground ops for more than ___ seconds.
30 seconds
What are some conditions that may turn off the YSAS?
- AC power failure 2. Right essential DC power failure 3. MDP failure 4. ADC failure 5. EGI failure 6. Utility hydraulic failure 7. Transfer of ICAO data from the DTS 8. Generator cross-over checks
The front canopy is designed to withstand the impact of a ___ lb bird at aircraft speeds ranging from ___ to ___ knots, depending on where the impact occurs.
4 lb bird 125 - 400 knots
If possible, avoid opening the canopy when relative wind component exceeds 30 knots. How do you calculate relative wind?
Ground speed plus wind component over the nose
The canopy jettison system only works properly with both canopies in what position?
Down and locked
The manual override handle (MOR) provides manual seat separation capabilities if the automatic seat separator fails or if desired above ___ MSL.
14,000 ft MSL
During ground egress, what two ways may the leg garters be released?
- Individually operating the release button for each line 2. Operating the quick-release lever on the forward left side of the ejection seat
The emergency oxygen cylinder provides oxygen for approx. ___ minute(s), or until aircrew/seat separation
10 minutes
Do not operate the seat adjust switch for more than ___ minute(s), in any 8 minute period or the seat actuator could be damaged
1 minute
