Dash One Sxn 1 Flashcards
What kind of aircraft is the T-38?
A two-place, twin-turbojet supersonic trainer
What is the approximate gross weight of a fully serviced aircraft with two aircrew?
12,800 lbs
What kind of engines does the T-38 have?
Two General Electric J85-GE-5R/S eight stage axial flow turbojet engines
How much thrust do they produce at sea level standard day settings?
MIL: 2200 lbs
MAX: 3300 lbs
Where is EGT measured?
T5 or the turbine exit
What kind of power is required to energize the ignition holding relay? What about the igniter firing?
DC
AC
What happens when the start button is pushed? What about when the throttle is bumped to IDLE?
Start button arms the igniter relay and timer
Throttle to Idle energizes the exciter, and starts fuel flow and fires the main and AB igniters
Does pushing the start button again during a 30 second cycle reset the ignition timer?
No. The relay is energized until the timer expires and is locked in cycle
From where is air taken for the pneumatic system?
Eighth stage compressor
What is part of the pneumatic system?
D-defog C-canopy seal G-g suit system A-Air conditioning P-pressurization \+2-hydraulic reservoir, anti ice
What are the pneumatic system controls powered by?
AC, except defog (pneumatically controlled)
What is a throttle burst?
Throttle movement in 1 second or less from idle to MIL
What is on the EED?
RENO RPM EGT Nozzles Oil (also Fuel Flow and Fuel)
For engine and fuel data to display on the MFD EED display page what must happen?
At least one EED must be on and operating
What does the EED operate on?
Right essential DC
What EED sensors require AC power?
Oil pressure, Fuel Flow, and fuel quantity
During battery power engine starts the EED display powers up at maximum Day Mode brightness regardless of switch position when what?
Battery voltage is less than 22 VDC
Which EED is Slave and Master normally?
FCP is Master; RCP is Slave. EED will automatically switch it if it senses it is not receiving data from the Master.
What does OFF mean on the EED?
SensOr failure
What does FAIL mean on the EED?
Internal EED Failure
When either EED is powered ON or OFF the EED momentarily activates what?
A FUEL LOW caution light
The EED should come on within what time with ambient temperatures above 32 deg F?
15 seconds; if below this, it may take up to 4 minutes
The RPM display shows a maximum of what RPM?
110%
When will you get 0% RPM?
Whenever the sensor senses 0% RPM or when it is unable to detect the RPM sensor signal
How many seconds does it usually take for the INIT to vanish from the EED?
8 seconds
What’s the EGT range on the EED?
0-1200 deg C
When does the EED oil pressure pointer turn red?
1) Less than 5 psi instantaneously with WOW
2) Less than 5 psi for 10 s continuously with weight-off-wheels
3) Greater than or equal to 56 psi for 6 minutes with WOW
4) Greater than or equal to 56 psi instantaneously with weight-off-wheels
Fuel flow needs what kind of electrical power?
AC and DC
Does fuel flow indicate increased fuel flow during AB?
No.
The EED can read as high as what fuel flow with a shutdown engine?
60 pph
The fuel quantity indicators need what to function?
Right oil pressure synchro reference from the right AC transformer
Turning on pitot heat or exterior lighting may do what to fuel quantity indications?
May cause up to 100 lb change in fuel quantity. Changes greater than this are indicative of fuel quantity probe failure
When do you get a BIT FAIL on the EED?
When the EED detects an internal fail that is not related to indicator display data
When you have an EED overtemp what happens?
EED HOT is displayed and display brightness is reduced by 50%. Even if the display backlights shut off the EED will still send data to the Slave and MFD
When does the EED fuel quantity show a white fuel imbalance?
60-190 lbs imbalance
When does the EED show a red fuel imbalance?
Above 200 lbs
What’s in the main fuel control system?
Two-stage engine-driven pump, main fuel control, and an overspeed governor.
What functions does the main fuel control perform?
1
If one fuel system has less than ________, the surface of the fuel falls below the fuel boost pump upper inlet and boost pump output is reduced approximately _______%.
650 lbs; 40
What should you do to ensure max useable fuel from both systems with a FUEL LOW caution light?
Maintain a slightly nose up flight attitude
What is the caution about taxiing with low fuel?
Taxi ops with less than 150 lbs in either fuel system could cause cavitation of the boost pump of that system resulting in engine flameout during turns and low power settings.
What’s the note about low fuel state descents?
Do not maintain a nosedown attitude for extended periods, transit occasionally to a positive pitch attitude to refill the boost pump sump
