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17 Cards in this Set
- Front
- Back
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what sys can the battery power
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stby ac bus
stby dc bus bttery bus shbb hbb |
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cross bus tie relay
1. purpose 2. what happens when it opens 3. when does it open |
1. allow busses to be separated to provide independent pwr sources for equipment on DC bus 1 and DC bus 2
2. glide slope capture during a flt director or autopilot ils approach OR bus transfer switch is turned off |
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generator load shedding .. what sheds?
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transfer bus 2 galleys, then transfer bus 1 galleys, then both AC bus 1 & 2 ... they will reset if power is restored
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items powered by stby pwr sys
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battery
battery bus hot battery bus switched hot battery bus standby ac standby dc static inverter |
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lights available on stby pwr
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white dome
instrument flood selected info lights battery powered warning lights magnetic compass light |
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how does battery supply power to the aircraft?
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supplies DC power to a static inverter which produces AC
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if AC power fails, what can the battery power?
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the standby system, which is made up of stby ac, stbd dc, batt bus, shbb, hbb
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what is function of the bus tie breaker system?
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allows one source of power to supply pwr either or both of the transfer buses simultaneously
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what is the function of the cross bus tie relay when shooting an approach?
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it seperates the busses to provide independent pwr sources for equip on DE bus 1 and DC bus 2. this happens at glid slope capture during a flt director or autopilot ILS. this prevents one bus from affecting the nav receivers and FCC's of the other
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what does AC ground service bus power?
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utility outlets, cabin lighting and battery charging
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when do generators load shed?
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load above 90KVA
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what do generators load shed?
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transfer bus 2 galleys, then transfer bus 1 galleys then AC mail buses 1 & 2
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when will the IDG disconnect switches work?
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1. elect pwr available
2. engine start lvr in IDLE |
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what is powered when turn STBY POWER sw to off
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batt, hbb, shbb ........ ac and dc stby & static inverter not powered
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what do you lose on a STBY PWR approach?
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1. flap pos indicator
2. autobrakes 3. auto speedbrakes |
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stby power only - captain has?
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PFD
ND compressed upper DU FMC EFIS control panel |
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stby power - fo has?
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clock only
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