FLIGHT ANOMALIES

Question 1

Start Abort Blades

Abort start if blades not turning by

Answer 1

25% N1

Question 2

Start Abort Blades Possible Causes

Answer 2

Tied down, rotor brake on, carbon lock

Question 3

Engine Fire on Start or Shutdown Causes

Answer 3

Overload of fuel in comb chamber or
delayed ignition of fuel resulting in
flames from the tailpipe

Question 4

Drive Shaft Failure between engine & trans

Answer 4

Lh yaw, rapid dec Nr with low rotor light

Inc N2 with inc eng noise

Question 5

Tail Rotor Vortex Ring State Symptoms

Answer 5

Uncontrollable right hand turn

Question 6

Tail Rotor Vortex Ring State Recovery

Answer 6

lower collective (max power to t/r)
full left pedal
forward cyclic

Question 7

Retreating Blade Tip Stall Symptoms

Answer 7

(airspeed of retreating blade exceeding VNE) LH roll, nose pitch up, shaking

Question 8

Retreating Blade Tip Stall

Answer 8

lower collective to reduce blade pitch then lateral cyclic to slow a/s

Question 9

Stuck Pedals In flight - left nose

Answer 9

• anticipate rolling off throttle on landing to keep straight
  raise collective, nose swing right
  lower collective, nose swing left

Question 10

Stuck Pedals In flight - right nose

Answer 10

auto rotate

Question 11

Stuck Pedals In the hover

Answer 11

right reduce throttle & raise collective to land

left lift collective to stop rotation & use cyclic to spill the lift

Question 12

Vortex Ring State Conditions (6)

Answer 12

Flying in your own downwash
Airspeed 0-20 mph
Rate of descent 500-1500 fpm
High power, high altitude, high gross weight

Question 13

Vortex Ring State Recovery

Answer 13

Forward cyclic while reducing collective

Question 14

Vortex Ring State Prevention

Answer 14

Max rate of descent 300 fpm

Question 15

Lag

Answer 15

Decrease in engine rpm as a result of a change in pitch of the main rotor blades corrected by the pilot using the beep switch

Question 16

Droop

Answer 16

Normal decrease/increase of the engine rpm as a result of a change in pitch of the m/r blades corrected for automatically by the governor thru the linear actuator

Question 17

Track

Answer 17

Vertical path of the blades thru the air
If one blade path is higher than the other, creates a vertical hump
- trim tab corrects problem
blade down, trim tab movement down
blade up, trim tab movement up

Question 18

Balance

Answer 18

Lateral wobble due to uneven blade weight - correct by placing additional weight in hollow bolt on m/r grip

Question 19

Mast Bumping Causes

Answer 19

negative G condition, updraft,
level off too quick, dive
mast bumping is caused if you counteract the RH roll with left cyclic prior to reloading the blades.

Question 20

Mast Bumping Symptoms

Answer 20

disc is unloaded, t/r still produces thrust, causes LH yaw and RH roll
roll further induced by t/r

Question 21

Mast Bumping Recovery

Answer 21

CORRECTIVE INPUT MUST BE AFT CYCLIC FIRST TO RELOAD BLADES THEN ONCE THE DISC IS RELOADED, LATERAL CYCLIC TO LEVEL

Question 22

Ground Resonance Cause

Answer 22

Vibration from skids through mast to blades

Question 23

Ground Resonance Recovery – low rpm

Answer 23

Close throttle, lower collective

Question 24

Ground Resonance Recovery – ops rpm

Answer 24

Take off, allow blades to realign, land

Question 25

Dynamic Rollover Cause

Answer 25

1 skid stuck or snagged

Question 26

Dynamic Rollover Recovery

Answer 26

Down collective