UH 72 - STUDY GUIDE Flashcards
How many fuel tanks does the helicopter have ?
2 Main tanks
1 Separated supply tank
with overflow to main tank
What engines does the UH72 have ?
How many horsepower do they supply ?
2 Turbomeca Arriel 1 E2 engines
760 shp each
What type of power consumers are connected to the:
Essential buses
- Consumers with low energy demand
- Consumers that are vital under emergency conditions
What type of power consumers are connected to the:
Shedding buses
- DC power consumers
Which buses are not supplied with power in case of 2xGEN failure ?
The shedding buses
What supplies the OH panel with power ?
Mainbus 1+2
or
Battery bus
What supply the shedding buses with power ?
Main bus 1+2
What supply the essential buses with power ?
Battery bus
What does the single bus bar for AC voltage, supply ?
Weather radar, mechanical gyros…
What position is the EMER SHD BUS in by default ?
And what does this position mean ?
NORM:
The shedding buses are powered if supplied by a minimum of 1 GEN or the EPU
What happens if the EMER SHD BUS switch is turned to the “on” position ?
The shedding buses gets supplied by the battery
( in case of 2 x GEN failure )
What does the three positions, of the BUS TIE 1+2 switch, do ?
NORM: Connect battery bus to main busses
OFF: Separates the two main buses
RES: Resets functions when the two main buses has been separated by a fault or protective measure
What is the purpose of “VENT ENGINE 1+2”?
When switched to ON engines begins to turn for ventilation
What is the purpose of “TRAIN ENGINE 1+2” ?
Arming the respective single engine training mode.
Allows for single engine training without reaching or exciting max single engine power
How can you reset the “gong” ?
RESET button on cyclic stick
or
SELECT key on the CAD
W/U : what does EXT indicate ?
Bottle discharge activation
W/U : When will the “Master caution” illuminate ?
With each caution message on the CAD
W/U : When will the “Master caution” extinguish for the panel ?
Depressing the RESET button on the cyclic
and activated again with the next caution
W/U : When will the fire light illuminate ?
If a fire is detected in the respective engine compartment
(Engine 1 or 2)
W/U : What does “BOT 1+2” indicate ?
Availability of fire extinguisher bottles
W/U : What does “LOW FUEL1+2” indicate ?
What is standard reaction ?
Supply tank 1+2
approx 24 kg (53lbs) fuel remaining in respective fuel tank.
Landing within 10 minutes
W/U : What does “ENG 1+2 FAIL” indicate?
Respective N1 RPM below 50%
W/U : What does “ROTOR RPM” indicate?
What sounds follow
Nro = Rotor speed warning
________
LOW 95% = beeping “pulsed tone”
HIGH 106% = gong
110% = High pitch audio “tone”
W/U : What sound is the fire warning and then will it not sound ?
Warning bell
Will not sound when it happens simultaneously with a RPM warning. Only the RPM warning will sound.
