AUXILIARY
POWER UNIT
AIRPLANE
OPERATIONS
MANUAL
2-09-05
Page
8
Code
01
REVISION
37
AOM
-145/
111
4
APU STARTING/OPERATION
The APU starting cycle is initiated when the APU Master knob, located
on the APU control panel, is moved to the ON position. At this
moment, an EGT valid value is shown on the EICAS. On the Model T-
62T-40C14 APU, at this time, the fuel shutoff valve is energized to
open. When the Master switch is momentarily set to START, DC
power is applied to the starter-generator, which will drive the APU
compressor up to a speed high enough to obtain sufficient airflow for
combustion.
On the Model T-62T-40C11 APU, at approximately 3% rotor speed on
the ground (or 0% in flight), the ESU supplies power to the ignition unit
as well as power to open the Start Fuel Solenoid Valve, allowing fuel
to flow to the combustion chamber. At 14% rotor speed, the Main Fuel
Solenoid Valve is energized. The APU continues accelerating up to
the 70% rotor speed, when the ESU commands starter
disengagement and Start Fuel Solenoid Valve and ignition
deenergization.
On the Model T-62T-40C14 APU, at approximately 3% rotor speed on
the ground (or 0% in flight), the FADEC supplies power to the ignition
unit as well as power to open the Main Fuel Solenoid Valve, allowing
fuel flow to the combustion chamber. The APU continues accelerating
and, when rotor speed exceeds 50%, the FADEC de-energizes the
starter and at 70% rotor speed the FADEC de-energizes the ignition
exciter.
The APU acceleration continues by the APU’s own means and, 7
seconds after having reached 95% rotor speed, the Maximum Fuel
Solenoid Valve is energized (T-62T-40C11 Model) or the FADEC
energizes the Ready-to-Load (RTL) output signal (T-62T-40C14
Model), allowing electrical and pneumatic power extraction through the
starter-generator and the bleed valve, respectively.
If a failure in the control system occurs, associated with an APU
overspeed, the Model T-62T-40C11 APU will automatically shutdown
after the rotating parts reach 108% speed, while the Model T-62T-
40C14 APU will automatically shutdown after the rotating parts reach
104% speed.
Summary of Contents for EMB145
Page 3: ......
Page 610: ...EMERGENCY PROFILES AIRPLANE OPERATIONS MANUAL 1 03 95 Page 2 Code 03 SEPTEMBER 29 2000...
Page 611: ...AIRPLANE OPERATIONS MANUAL EMERGENCY PROFILES SEPTEMBER 29 2000 1 03 95 Page 3 Code 03...
Page 614: ...ABNORMAL PROFILES AIRPLANE OPERATIONS MANUAL 1 03 97 Page 2 Code 01 REVISION 25...
Page 615: ...AIRPLANE OPERATIONS MANUAL ABNORMAL PROFILES DECEMBER 20 2002 1 03 97 Page 3 Code 01...
Page 616: ...ABNORMAL PROFILES AIRPLANE OPERATIONS MANUAL 1 03 97 Page 4 Code 01 DECEMBER 20 2002...
Page 622: ...PERFORMANCE AIRPLANE OPERATIONS MANUAL 1 04 03 Page 4 Code 01 REVISION 34 INTENTIONALLY BLANK...
Page 1000: ...LOADING AIRPLANE OPERATIONS MANUAL 1 07 10 Page 4 Code 40 JUNE 28 2002 EMB 145 DOOR CLEARANCES...
Page 1070: ...AIRPLANE OPERATIONS MANUAL LOADING DECEMBER 20 2002 1 07 80 Page 3 Code 01...
Page 1072: ...AIRPLANE OPERATIONS MANUAL LOADING DECEMBER 20 2002 1 07 80 Page 5 Code 01...
Page 1074: ...AIRPLANE OPERATIONS MANUAL LOADING DECEMBER 20 2002 1 07 80 Page 7 Code 01...
Page 1367: ......
Page 1718: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL MARCH 28 2002 2 05 10 Page 3 Code 01 CONFIGURATION 1...
Page 1720: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL REVISION 22 2 05 10 Page 5 Code 01 CONFIGURATION 2...
Page 1724: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL REVISION 23 2 05 10 Page 6C Code 01 CONFIGURATION 3A...
Page 1726: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL REVISION 26 2 05 10 Page 7 Code 01 CONFIGURATION 3B...
Page 1766: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 05 Page 3 Code 01 COCKPIT LIGHTING...
Page 1768: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 05 Page 5 Code 01 GLARESHIELD PANEL...
Page 1770: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 05 Page 7 Code 01 OVERHEAD PANEL...
Page 1786: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 15 Page 7 Code 01 OVERHEAD PANEL...
Page 1792: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 20 Page 5 Code 01 OVERHEAD PANEL...
Page 1827: ...FUEL AIRPLANE OPERATIONS MANUAL 2 08 00 Page 2 Code 01 REVISION 17 INTENTIONALLY BLANK...
Page 1940: ...AIRPLANE OPERATIONS MANUAL POWERPLANT JUNE 28 2002 2 10 70 Page 5 Code 01 THRUST REVERSER...
Page 2030: ...AIRPLANE OPERATIONS MANUAL FLIGHT CONTROLS REVISION 19 2 13 20 Page 3 Code 01 RUDDER SCHEMATIC...
Page 2052: ...AIRPLANE OPERATIONS MANUAL FLIGHT CONTROLS REVISION 18 2 13 30 Page 3 Code 01 FLAP SCHEMATIC...
Page 2060: ...AIRPLANE OPERATIONS MANUAL FLIGHT CONTROLS JUNE 29 2001 2 13 35 Page 5 Code 01 CONTROL STAND...
Page 2159: ...AIRPLANE OPERATIONS MANUAL OXYGEN OCTOBER 02 2001 2 16 10 Page 3 Code 01 MAIN OXYGEN CYLINDER...
Page 2160: ...OXYGEN AIRPLANE OPERATIONS MANUAL 2 16 10 Page 4 Code 01 OCTOBER 02 2001 OXYGEN SERVICE PANEL...
Page 2176: ...OXYGEN AIRPLANE OPERATIONS MANUAL 2 16 20 Page 2 Code 01 REVISION 20 INTENTIONALLY BLANK...