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20 Cards in this Set
- Front
- Back
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To isolate AC Bus 1 from the electrical system:
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press in the left AUTO XFER switchlight, turn off the #1 generator.
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Once disconnected, the IDG:
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can only be reconnected on the ground by maintenance.
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The ADG supplies AC power to hydraulic pump:
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3B, and the AC Essential Bus.
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The ADG is rated at:
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115 VAC 15 KVA.
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115 VAC is converted to 28 VDC by the:
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Transformer Rectifier Units.
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With a TRU 1 failure, DC Bus 1 can be powered :
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automatically or manually by the SERVICE TRU when TIE 1 closes.
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An ESS TRU1 caution message indicates that TRU output is less than:
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18 volts.
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A failure of AC BUS 2 will result in the loss of ___ TRU(s)?
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3
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IDG 1 normally powers
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AC Bus 1, AC Essential Bus, AC Utility Bus 1.
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After ADG deployment, and a normal source of AC power is re-established.
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The PWR TXFR OVERIDE switch will allow a normal AC power source to power the AC ESS Bus.
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Engine starting requires air from the APU, ground air cart, or
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60 psi minimum, 10th stage engine cross bleed air.
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Ignition system B is powered from the:
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DC Battery Bus.
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At low power settings (N1 less than 79%), the engine is on:
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N2 speed control, regardless of Speed switches position.
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The left Engine Start switch/light, when pressed in opens the:
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left and right 10th SOV's, 10th isolation valve, and left air turbine starter valve.
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During thrust reverser deployment:
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both the wing and cowl anti-ice valves close.
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Scavenge ejectors and gravity feed lines transfer fuel from the:
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main tanks to the collector tanks.
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How is fuel balance maintained between the main fuel tanks?
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Manually by the gravity crossflow valve.
Automatically by the XFLOW/APU pump and associated shutoff valves. |
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If the high pressure engine driven fuel pump fails:
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the engine flames out.
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Fuel is supplied to the APU by the:
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XFLOW/APU pump from both main tanks.
right engine supply line (if pressurized), under negative g conditions. |
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When the Boost Pump switch/lights are pressed in, the Boost pumps operate:
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when low pressure is detected in an engine feed line.
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