Crj 200 Avsoft Quick Study Guide

Front 1

DC SERVICE SWITCH

Back 1

Powers the DC Service Bus from the APU Battery Direct Bus

Front 2

BATTERY MASTER SWITCH

Back 2

Connects the main battery and APU battery to the Battery Bus via the Main Battery Direct Bus and the APU Battery Direct Bus

Front 3

EXTERNAL DC POWER SWITCH. AVAIL/IN USE

Back 3

AVAIL = DC power is connected and is operating within limits (Voltage and Polarity). IN USE = External DC power is supplying power to the APU and Main Battery Direct Bus

Front 4

EXTERNAL AC POWER SWITCH. AVAIL/IN USE

Back 4

AVAIL = AC power source is connected and within limits (Voltage, Phase, and Frequency). IN USE = External AC power source is powering the electrical system

Front 5

IDG DISCONNECT SWITCH. FALUT/DISC

Back 5

FAULT = High oil temperature or low oil pressure. DISC = Will automatically disconnect for Overtemp or Overtorque.

Front 6

AC ESS XFER SWITCH

Back 6

Illuminated when AC Essential Bus is not being powered by AC bus 1. It can auto or manual transfer to AC Bus 2

Front 7

GENERATOR SWITCH

Back 7

Connects the generator to the associated AC bus

Front 8

APU GENTERATOR SWITCH

Back 8

Connects the APU generator to the AC busses

Front 9

AC BUS AUTOMATIC TRANSFER SWITCH. FAIL/OFF

Back 9

FAIL = A Bus fault or generator overcurrent. The associated AC Bus cannot be powered by the APU or offside generator. OFF = Manually to disable the priority/auto transfer system.

Front 10

BUS TIE SWITCHES 1 & 2

Back 10

TIE 1 illuminates when DC bus 1 is not being powered by its normal source. The TRU 2 or Service TRU powers DC bus 1. TIE 2 illuminates when DC bus 2 is not being powered from its normal source. TRU1 or Service TRU powers DC bus 2

Front 11

ESS BUS TIE SWITCH

Back 11

MANUAL ONLY! Ties the Service TRU to the DC Essential and Battery Bus during an Essential TRU 2 failure.

Front 12

ENGINE FIRE DETECTION SWITCH

Back 12

A drop in electrical resistance in loop A and B will trigger a fire warning

Front 13

JETPIPE/PYLON OVERHEAT SWITCH

Back 13

A drop in electrical resistance in loop A and B will trigger an overheat warning.

Front 14

APU FIRE DETECTION SWITCH

Back 14

A drop in electrical resistance in loop A and B will trigger a fire warning

Front 15

FIRE DETECTION TEST SWITCH. WARN/FAIL

Back 15

WARN: Simulates a fire or overheat in the APU and Engines. Fire Bell, and APU/ENGINE FIRE, JETPIPE OVERHEAT. JETPIPE OVERHEAT AURAL WARNING. Associated switch lights and fire bottles illuminate. FAIL: Simulates a short on the the loops.

Front 16

BOOST PUMP SWITCH. PUSH IN/ON/INOP

Back 16

PUSH IN: 1. During engine start, both boost pumps operate 2. Both engines running, pumps are off and will automatically operate when low pressure is detected in either engine fuel feed line. ON: Illuminates when the associated pump is operating. INOP: A low pressure condition has been detected in the engine feed line, and the respective boost pump has not been armed, or has failed.

Front 17

GRAVITY CROSSFLOW SWITCH. PUSH IN/PUSH OUT/FAIL

Back 17

PUSH IN: Opens the balance shutoff valve. The OPEN light illuminates. RELEASE OUT: Closes the balance line shutoff valve. FAIL: The balance line shutoff valve is not in the commanded position.

Front 18

L/R XFLOW SWITCH. PUSH IN/PUSH OUT/FAIL

Back 18

PUSH IN: 1. Opens the respective XFLOW shutoff valve (must have XFLOW AUTO OVERRIDE switch selected to manual mode for valve to operate.) 2. The ON light illuminates 3. The XFLOW/APU pump operates. PUSH OUT: 1. Closes the respective crossflow shutoff valve 2. The ON light extinguishes 3. The XFLOW/APU pump stops. FAIL: The respective XFLOW shutoff valve is not in the commanded position or the XFLOW/APU pump fails to operate when the left or right XFLOW shutoff valve opens.

Front 19

XFLOW AUTO OVERRIDE SWITCH. PUSH IN/PUSH OUT

Back 19

PUSH IN: Arms the XFLOW/APU pump for manual XFLOW operation. Automatic operation is disabled. The MAN light illuminates. PUSH OUT: Arms the XFLOW/APU pump for automatic crossflow operation. Manual operation is disabled.

Front 20

DUCT MONITOR SELECTOR SWITCH. TEST/NORM/LOOP A/LOOP B

Back 20

TEST: Simulates a duct failure (by grounding) to test the 10th and 14th stage loops. NORM: Leak detection and warning is provided in all pneumatic ducting int eh fuselage, pylon, and wing areas. There are 2 10th stage loops and only 1 14th stage loop. LOOP A: Tests the 10th stage loop A for continuity. LOOP B: Tests the 10th stage loop B for continuity.

Front 21

14th STAGE SWITCH. PUSH IN/PUSH OUT/DUCT FAIL

Back 21

PUSH IN: Associated bleed air shutoff valve opens. PUSH OUT: The associated bleed air shutoff valve closes. DUCT FAIL: Illuminates to indicate a failure in the associated 14th stage duct. The light extinguishes when the failure is isolated and the duct cools below a predetermined value.

Front 22

14th STAGE ISOLATION VALVE SWITCH. PUSH IN/PUSH OUT

Back 22

PUSH IN: the 14th stage bleed air isolation valve opens. PUSH OUT: Closes the 14th stage bleed air isolation valve

Front 23

10th STAGE SWITCH. PUSH IN/PUSH OUT/DUCT FAIL

Back 23

PUSH IN: Associated bleed air shutoff valve opens. PUSH OUT: The associated bleed air shutoff valve closes. DUCT FAIL: Illuminates to indicate a failure in the associated 10th stage duct. The light extinguishes when the failure is isolated and the duct cools below a predetermined value.

Front 24

10TH STAGE ISOLATION VALVE SWITCH. PUSH IN/PUSH OUT

Back 24

PUSH IN: The 10th stage bleed air isolation valve opens. PUSH OUT: Closes the 10th stage bleed air isolation vlave.

Front 25

APU LOAD CONTROL SWITCH. PUSH IN/PUSH OUT/FAIL

Back 25

PUSH IN: Connects the APU pneumatic duct to the 10th stage bleed air manifold. PUSH OUT: Closes the APU load control valve and isolates the APU pneumatic duct from the 10th stage bleed air manifold. FAIL: Illuminates to indicate tha the APU load control valve is not in the commanded possition.

Front 26

APU START SWITCH. PUSH IN/PUSH OUT

Back 26

PUSH IN: 1. Energizes the starter motor, and the start light illuminates. 2. At 50% RPM, the START light extinguishes 3. Four seconds after the APU RPM reaches 95% RPM, the AVAIL light illuminates. PUSH OUT: Closes the Fuel Control Unit shutoff valve. The APU shuts down and the AVAIL light extinguishes.