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29 Cards in this Set
- Front
- Back
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max EGT on start
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760 c
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max transient overload EGT
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732 c
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max continuous EGT
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710 c
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normal APU voltage
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115 +/-3 (112-118)
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normal APU frequency
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400 Hz +/-10
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allowable APU voltage
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115 +/-8 (107-123)
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allowable APU frequency
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400 Hz +/-20 (380-420)
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MINIMUM battery voltage with emergency power on
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26 volts
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battery amp range with emergency power on
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10-35 amps
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normal apu r.p.m. range
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95-105%
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starter duty cycle
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1 min. on 4 min. off after 4 cycles, wait 30 min. before going through the cycle again
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caution apu r.p.m. range
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105-110%
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what chapter in the natops is the apu checklist
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9
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apu fire
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1 apu fire control switch - off & agent arm
2 agent- discharge (if APU FIRE warning light remains on, discharge 2nd bottle) 3 turn on emergency power switch. vhf will turn on |
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maximun apu r.p.m.
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110%
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apu fire
loop a or b only |
select the opposite loop that is illuminated and perform a loop integrity test on that loop system
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apu LOW OIL PRESSURE
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remember AIR-AUTO-OFF. turn the apu air off, place apu doors switch to auto (normally in auto), and turn the apu master switch off
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apu HIGH OIL PRESSURE and at what temp
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remember AIR-AUTO-OFF. turn the apu air off, place apu doors switch to auto (normally in auto), and turn the apu master switch off. above 120 c
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aircraft batteries without a load
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27 volts dc (vdc)
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excessive battery charge
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above 65 amps
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when emergency power is on, voltage should not be below
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26 volts
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the apu egt idles between
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200 c- 400 c
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before shutting off apu what temp must you be below and for how long
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400 c 2 min.
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when does the egt at 760 c apply
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only during start
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when engaging the apu starter voltage should not be below
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22 volts
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tail compartment temp. high light
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turn apu air switch off and close the pneumatic cross feeds. ensure there is no bleed air from the apu leaking into the tail compartment. if light doesn't go out secure apu. try lowering aft stairs and cat walk.
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apu oil quantity
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4 quarts (1 gallon). 1 quart from add line to fill line
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what kind of starter is the apu
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electric
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what transfer bus powers the fire detection/protection
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dc
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