Performance & Systems

Question 1

Hover Chart Area A

Answer 1

Hover performance from which controlability has been demonstrated in sideward/rearward relative wind conditions up to 20 mph

Question 2

Hover Chart Area B

Answer 2

Hover performance in calm winds or winds outside the critical relative wind azimuth area (050°-210°)

Question 3

Hover Chart Critical wind azimuth area

Answer 3

Winds 050°-210° hinders t/r
(requires more power to counter Tq & wind)
Winds outside helps t/r
(requires less power to counter Tq)

Question 4

Power Check

Answer 4

Min Tq that must be avail to meet min eng specs

Question 5

Power Check

Answer 5

In hover, level flight, or 60 mph climb
Anti ice and generator off
Raise collective to max TOT of 810°C or max TQ of 100%
Record OAT,ALT,TOT,TQ
Actual Tq must be ≥ chart Tq to be acceptable

Question 6

Power Check vs Temperature

Answer 6

Cold Day Tq limits TOT

Hot Day/high alt TOT limits Tq

Question 7

Deceleration Check - Roll off throttle

Answer 7

N2/Nr needles split & N1 100% to idle

Failure within 3 sec indicates sprag clutch seizure

Question 8

Tach Gen

Answer 8

Shaft inside produces electrical alternating current relative to the speed of N1, N2, or NR which is relayed to the gauge
no need for gen or battery power, as the tach gen produces it’s own current

Question 9

Chip Detectors Location

Answer 9

2 trans, 2 turbine, 1 fwu, 1 trgb

Question 10

Chip Detectors

Answer 10

On Illumination, remove, inspect, clean, & reinstall - Ground run for 30 min
No Illumination - OK to fly
Yes Illumination - Grounded

On Illumination, remove, inspect, clean, & reinstall - Ground run for 30 min
No Illumination - OK to fly
Yes Illumination - Grounded

Illumination again within 8 flight hours - Grounded

Question 11

Hydraulic Bypass System 1 of 4

Check hydraulic switch on

Answer 11

Solenoid is de-energized (off)(SW on CB in)
Hydraulic assist is on
Hydraulic fluid flowing through system

Question 12

Hydraulic Bypass System 2 of 4

Pull hydraulic CB out

Answer 12

Removes power to solenoid
System has fail-safe mode to ON (solenoid off)
If cause is electrical, Hydraulic assist should be restored & Hydraulic fluid should flow through system

Question 13

Hydraulic Bypass System 3 of 4

If no change Push hydraulic CB in

Answer 13

Power restored to solenoid
Solenoid is de-energized (off)
Hydraulic assist should be on
Hydraulic fluid should flow through system

Question 14

Hydraulic Bypass System 4 of 4

If no change Turn hydraulic switch off

Answer 14

Solenoid is energized (on)
Hydraulic assist is off
Fluid is re-routed to reservoir
Prevents hydraulic  assist system from
activating on  final approach or landing

Question 15

Tail Rotor Drive Shaft Witness Pin

Answer 15

Restricted movement indicates t/r drive shaft torque or twist stress

Question 16

Hydraulic Actuator Bolts

Answer 16

Restricted movement indicates stress between flight controls and actuator control rods input flight control
– pressure from hydraulic actuator moves control rod attached to the desired control

Question 17

Hydraulic Bypass Pin & A/F Oil Bypass Pin

Answer 17

Warns of dirty filter – senses build up of pressure due to blockage
reset once 30 min flight time prior to recheck

Question 18

Engine Auto Relight

Answer 18

Actuated by the decay of engine bleed air as a result of flameout
also reads N1 Tach gen
no activation above 12,000’

Question 19

Freewheel Unit Sprag Clutch

Answer 19

Metal sprags slightly longer than inner/outer diameter
With power engaged, sprags wedge between inner & outer and both turn together
In autorotation, inner drive shaft rpm is reduced (power off), but outer shaft is spun by inertia of the blades
The sprags between the two become un-wedged and allows the outer to turn freely