AC sources
AC Generator (x2)
APU AC Generator
External Power
DC sources
DC Converters (115VAC to 28VDC)
SLAB (24VDC)
AC Gen locations
MGB Accessory Modules
AC Gen output
30/45 KVA, 115 VAC, 3 Phase, 400 Hz
APU Gen output
20/23.8 KVA, 115 VAC, 3 Phase, 400 Hz
Generator Control Unit (GCUs) monitor what?
Overvoltage
Under-voltage
Under-frequency (on ground only)
Feeder Fault (open or short)
External Power monitor regulates what?
Phase rotation
Overvoltage
Under-voltage
Under-frequency
Over-frequency
Automatic AC bus switches compensates for AC Gen load. AC bus switching prioritizes what two systems?
1: Hydraulic back up pump
2: Rotor De-Ice
Gens may not reset in flight if Nr is below ____%
97%
“APU GEN ON” indicates what?
The APU Gen is the only source of AC power
DC Converters are located where
LH and RH J-Boxes
DC Converter output
28 VDC, 200 Amps
Main aircraft battery output
SLAB: Sealed Lead-Acid Battery
24 VDC, 5.5 amp hrs
SLAB Primary and Secondary functions
Primary: APU start
Secondary: Emergency DC power
SLAB life is ____ mins w/out shedding and _____ w/ shedding.
W/out shedding: 34 mins
W/ shedding: 41 mins
HEELS controller is located where?
Aft cabin absorber
Emergency Egress lights while illuminate under what conditions?
3 I’s: Inversion, Immersion and Impact (10 G’s)
Cockpit Lighting
Map Lights and Thunderstorm light
Cabin Lighting
Normal/NVG modes, Hoist operator light
RH (STBD) position light color
Green
LH (PORT) position light color
Red
Aft position light color
White
Anti-Collision light color
Day: White
Night: Red
