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81 Cards in this Set

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What does Essential AC bus relay No. 1 do when its energized?
Connects power from Bus A to MEAC bus.
What does the Essential AC bus relay No. 1 do when its de-energized?
Connects the essential AC bus monitoring relay to MEAC bus
How can the normally energized Essential AC bus relay No. 1 be de-energized?
By placing ESS BUS monitoring switch to OFF.
What does the Essential AC bus monitoring relay do when energized?
Connects power from RAR circuit to essential AC bus relay No. 1
How can the normally energized Essential AC bus monitoring relay be de-energized?
By placing ESS BUS monitoring switch OFF
What does Essential AC bus relay No. 2 do when energized?
Connects power from RAR circuit to FEAC
What does Essential AC bus relay No. 2 do when de-energized?
Connects Bus A to FEAC
What buses are located in the Forward Load Center Circuit Breaker Panel (FWD)?
1. MEAC Bus
2. EXT MDC Bus
3. APU ESS bus
4. MEDC Bus
What buses are located in the Forward Load Center Circuit Breaker Panel (AFT)?
1. SEAC bus
2. SEDC bus
3. GOB
4. 28VAC Forward Lighting Bus XFMR
5. 26VAC Instrument Bus XFMR No. 1
6. 26VAC Instrumen Bus XFMR No. 2
What buses are located in the Forward Load Center Lower Circuit Breaker?
1. FEAC Bus
2. FEDC Bus
3. MEDC Bus
4. Essential DC bus feeders
5. MEAC Bus Feeders
6. No Name
What buses are located in the Main Load Center Circuit Breaker Panel?
1. Main DC Bus
2. Main AC Bus A
3. Main AC Bus B
4. 28VAC Aft Lighting Bus XFMR
What are the bus priorities for FEAC?
Gen 2
External Power
Gen 4
APU
Gen 3
Bus A
What is the bus priorities for MEAC?
Bus A
Gen 2
External Power
Gen 4
APU
Gen 3
What is the bus priorities for SEAC?
MEAC
SEDC via Inverter
What is the bus priorities for Bus A?
Gen 2
External Power
Gen 4
APU
Gen 3
What is the bus priorities for Bus B?
Gen 3
External Power
Gen 4
APU
Gen 2
What is Main DC's normal and alternate Power source?
TR No. 1 and TR No. 2 operating in parallel
What is EXT Main DC's normal and alternate power source?
Normal - Main DC
Alternate - No alternate
What does MEDC (SAM) feeders power?
Feeder 3 - SEDC
Feeder 1 - armament
Feeder 2 - MEDC (electric)
What is MEDC (SAM) normal and alternate power source?
Normal - TR No. 3
Alternate - EMDC bus through power - blocking diode No. 1
What is MEDC's (electrical) normal and alternate power source?
Normal - MEDC (sam)
Alternate - No alternate
What is FEDC's normal and alternate power source?
Normal - MEDC through power - blocking diode No. 2
Alternate - aircraft battery
Is their any way to secure FEDC?
No, it does not have a feeder circuit breaker
What is the normal and alternate power source for GOB?
FEDC though de-energized GOB relay
Alternate - No Alternate
What is the normal and alternate power source for APU ESS?
Normal - MEDC (electic) through energized MEDC (electric) powe sensing relay.
Alternate - GOB throught de-eergized MEDC bus (electric) power sensing relay.
What is the normal and alternate power source for SEDC?
Normal - MEDC (Feeder 3) bus through de-energized inverter powerer relay
Alternate - FEDC bus through energized inverter power relay.
What are the 5 possible malfunctions if the External power available light ON is on but there isno power into the aircraft?
1. Wrong Phase, frequency, or voltage
2. Nosegear uplock not properly positioned
3. Battery not connected
4. Generator No. 4 RAR feeder circuit Breaker out
5. External power control circuit breaker out
What are the possible malfunctions if the FEAC bus is the only one energized?
1. MEAC ganged CB out
2. ESS Bus monitoring switch OFF
What is the possible malfunction if the MEAC, SEAC, and FEAC buses are energized, but MEDC, BUS A, and BUS B are not?
TR 3 circuit breaker out
What has similair effects as TR 3 circuit breaker out except that elctronic and armament power will be available through DC feeder #1 adn SEDC bus will be available through DC feeder #3?
Essential DC bus feeder circuit breaker No. 2 out.
What are the 3 different models of APU?
GTCP95-2
GTCP95-3
GTCP95-10
What is the purpose of the APU?
To provide pnuematic and electrical power necessary to make the aircraft self sufficient.
True / False
Bleed air from the APU is available in flight
FALSE
APU bleed air in not available in flight
What does the APU provide?
Electrical
Bomb bay heating
Aircraft A/C
Main Engine Starting
What are the Intake and Exhaust doors Power Source?
APU essential DC bus
What are the 2 main sections of the APU?
Accessory Section
Compressor and Turbine Section
True / False
Ground AC and engine starting CANNOT be used simultaneously
True
True / False
Ground AC and bomb bay heat CAN be used simultaneously
True
What type of turbine is on the APU?
Single stage radial inward flow turbine
When does the oil pressure sequence switch close?
approx 10% RPM with positive oil pressure
At what RPM is the starter motor de-energized?
35%
At what RPM does the igniton de-energize, read-to-load circuitry energizes and hour meter/start counters start?
95%
Which APU's have start hour meters and start counters?
-2 has starts hour meter
-3 and -10 has start counter
When does overspeed protection kick in?
106%
What are the power sources for the starter motor?
If MEDC is available through EMDC
If MEDC is not available through FEDC
How much fuel an hour does the APU consume during nomal operating condiitons with the AC on?
300 pounds per hour
Where is the normal fuel supply?
Wing Tank #2 but can also be supplied by Wing tanks 1, 3, and 4 by crossfeed system
Where is the manual fuel shut-off valve located?
Port Flap Well
What is the purpose of the load control and pneumatic system?
control amount of air which may be bled from the compressor
What is Load Control Valve power source?
GOB though APU 95% switch
What is the APU oil tank capacity?
1.0 gallon
When does the APU oil tank require servicing?
when oil level is @ or below half mark on lower sight gauge
What are the 2 oil types?
Primary - MIL-PRF-23699
Alternate - MIL-PRF-7808
What is the temp limits on MIL-PRF-23699?
-40*C - 54*C
What is the temp limits on MIL-PRF-7808?
-54*C - 54*C
What does the tachometer indicate?
Gas turbine engine speeds in percent RPM
Where does the tachometer receive its input from?
APU Tachometer Generator
Where does the Exhaust Gas Temperature (EGT) receive its input from?
APU Exhaust thermocouples
How long will the APU doors closing delay after "OFF" is selected?
1 min
What does the "ARM" position allow on the INFLIGHT ARMING switch?
Allows APU to be operated in flight
What is the power source for the signal lights?
APU essential
When does the (fire) Detection System actuate?
when temperature of 400*F is exceeded
Where is the extinguishing system located?
Nose wheel well
What extinguishing agent is used in the High Rate Discharge (HRD) container?
Bromotrifluoro mehtane
CF BR
3
What is the expelling agent used in the extinguishing system?
Dry Nitrogen
600psi @70*F
What is the power source for The Extinguishing System?
APU Essention
Where is the APU fire warning and extinguisher panel located?
copilot center glare shield
Where are the APU fire warning horns located?
Flight station and Cabin
What is the power source for APU Fire detection TEST switch?
APU Essential
What happens when "SAFE" is selected on the APU and Fire Extinguishing Safety Switch?
1.Intake and exhaust doors can not be moved
2. APU cannot be started, if APU running it shuts down
3. Deactivates fire extinguishing system, but fire detection is still operative
How long until extinguishing agent will automatically discharge if exhaust doors fail to close?
20 sec
What is the maximum altitude for APU operation?
20,000 ft
What is the maximum altitude for using the APU as a bleed air source for main engine starting?
6,000 ft field elevations
What is max continuous, max for 10 sec, and max peak for GTCP95 - 2?
688*C
710*C
715*C
What is max continuous, max for 10 sec, and max peak for GTCP95 - 3?
649*C
N/A
704*C
What is max continuous, max for 10 sec, and max peak for GTCP95 - 10?
649*C
710*C
732*C
What is the APU ground RPM range?
98-102%
What is the APU Flight RPM range?
98-103%
What is APU over speed?
106%
What is the max airspeed with doors open?
225 knts
What is the purpose of load monitoring?
Reduces or secures certain electrical loads during single generator operation.