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AS350B2 > Emergencies > Flashcards

Emergencies Flashcards

1
Q

Engine Fire on Start (uncontrolled increase of T4)

A 
CLOSE fuel shut off valve
rotor brake ON
boost pumps OFF
CRANK for 10 seconds
evacuate passengers
battery OFF
extinguish fire
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2
Q

Fire in Flight
FIRE light ON

(smoke trail, smell, inc T4, erratic eng indications)

A

confirm fire
Autorotate

CLOSE fuel shut off
boost pumps OFF
generator OFF

radio call MAYDAY
brief passengers
master OFF if smell of burning
ventilate cabin
shutdown and evacuate
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3
Q

Smoke in the Cabin

smoke, burning smell, electrical malfunction

A 
radio call - MAYDAY
Land ASAP
if smoke source identified
     turn off affected system
     ventilate cabin
if smoke source not identified
     heater/demister OFF
     electrical master "ALL OFF" OFF
     if smoke clears
          all switches inc generator - OFF
     reset battery ON
     reset  electrical master ON
     generator ON - check voltage
switch on circuits one by one until malfunction identified
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4
Q

Tail Rotor Drive Failure in Flight

Uncontrolled left yaw
Noises
Vibration

A

reduce collective and maintain forward speed
find a/s power setting to maintain level flight
select landing sight
Steep approach
FFC off on final and autorotate
landing at lowest possible speed

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5
Q

Tail Rotor Drive Failure in Hover or low speed

noises
vibration
uncontrolled left yaw

A

IGE - reduce collective to land

OGE - reduce collective moderately
use cyclic to pick up speed into wind
steep approach

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6
Q

Tail Rotor Control Failure
landing made easier with wind from right
with airspeed lower than 20 kts go around impossible

pedal jam or disconnected

A

Airspeed to 70 its
HDY TEST BUTTON press for 5 sec to neutralize t/r
pedals the reset to normal
shallow approach with nose to the right (side slip left)
side slip reduces with inc collective on landing

gentle cyclic flare with run on landing in a clear area

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7
Q

Tail Rotor Control Failure
(stuck pedal)

landing is made easier by a wind coming from the right. if airspeed is lower than 20 kts go around is impossible due to the loss of efficiency of the fin

A

set 70 kts level flight
press HDY TEST switch for 5 sec then reset to neutralize t/r pedals

shallow approach at 70 kts with left
side slip to run on ldg

The side slip will be reduced as power is applied

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8
Q

Collective HDY button

A

powers isolation solenoid which isolates the 3 main servos

no boost in cyclic, boost in pedals

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9
Q

Panel HDY button

A

isolates the HDY distribution block

boost provided by accumulators - pedals stiff

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10
Q

Engine Failure in Hover IGE
rh yaw, horn,Zero Tq, Nr 360 dec, T4 dec, Ng dec
gen light, eop drop & light

A

IGE maintain heading with pedals
control drift with cyclic
control rate of descent cushion landing with collective
reduce collective as soon as a/c on the ground

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11
Q

Engine Failure in Hover OGE
rh yaw, horn,Zero Tq, Nr 360 dec, T4 dec, Ng dec
gen light, eop drop & light

A

OGE reduce collective to initiate descent
forward cyclic to gain airspeed according to height
collective and cyclic to flare or cushion landing
radio call
shutdown & evacuate

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12
Q

Engine Failure in Flight
rh yaw, horn,Zero Tq, Nr 360 dec, T4 dec, Ng dec
gen light, eop drop & light

A 
lower collective - autorotate		
rotor - Nr 320-430	
speed - 65-80 kts 			
spot - turn into wind/select landing site	
trim
radio call Mayday						
passenger brief
fuel shut off valve OFF						
boost pumps OFF						
generator OFF	
master switch off	(if smell of burning)	
flare, land, shutdown & evacuate
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13
Q

Governor Failure Low Side

large drop in fuel flow rate
horn, low Tq, Nr 360 dec, Ng dec then stabilizes <70%

A

establish autorotation
rotor Nr 320-430
speed 65-80 kts max 125 kts
spot turn into wind/select landing site
trim
Fuel Flow Control - advance slowly into gate to 70% Ng
Ng and T4 should rise

Collective - increase pitch to decrease Nr to 350
Fuel Flow Control - increase to 380 Nr
Trim Collective & FFC - to hold level flight at 380 Nr

to inc power - inc coll pitch to lower Nr to 350,
then inc FFC to 380 Nr etc
to dec power - reduce FFC to 350 Nr
then dec coll pitch to inc 380 Nr etc

low approach at 65 kts/394 Nr
reduce forward speed & land
FFC shutdown before lowering collective

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14
Q

Governor Failure High Side

Ng inc, T4 inc, Tq inc

A

DO NOT LOWER COLLECTIVE
FFC - reduce to get Nr in the middle of the green arc
Trim Collective & FFC - to mainain level flight at 380 Nr
continue flight out of governor range

to inc power - inc coll pitch to lower Nr to 350, then inc FFC to 380 Nr etc
to dec power - reduce FFC to 350 Nr then dec coll pitch to inc 380 Nr etc

low approach at 65 kts/394 Nr
reduce forward speed & land
FFC shutdown before lowering collective

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15
Q

Governor Failure Surging

Nr,Tq,Ng,T4 oscillations, jerks in yaw axis

A

reduce collective pitch
if surging continues - reduce FFC to leave governor range
if surging persists - land asap
if uncontrollable - autorotate

to inc power - inc coll pitch to lower Nr to 350,
then inc FFC to 380 Nr etc
to dec power - reduce FFC to 350 Nr
then dec coll pitch to inc 380 Nr etc

low approach at 65 kts/394 Nr
reduce forward speed & land
FFC shutdown before lowering collective

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16
Q

NG Indicator Failure

A

do not exceed Tq value: 100% when IAS < 40 kts
do not exceed Tq value: 94% when IAS > 40 kts
do not exceed T4 value: 730C when OAT < 15C
do not exceed T4 value: 750C when OAT > 15C

17
Q

Tq Indicator Failure

A

do not exceed Ng value: 90% @ SL to 98% @ 8000”

18
Q

T4 Indicator Failure

A 
follow Ng Limitations 
max cont 98%
max t/o 101.5%
max trans 107.5%
do not attempt to start engine
19
Q

NR/Nf readings below green ark

A

if values agree - reduce collective pitch
indicator should rise to governed value
if not follow GOV Low procedure

20
Q

NR/Nf readings different

A

NR > Nf - NR is incorrect
Nf > NR - on ground - during start - reduce fuel flow control to check for freewheel slippage
in flight - Nr is incorrect

21
Q

Rotor RPM Indicator Failure

A

complete loss of Nr indication - maintain eng torque above 10% - Nr given by the NF pointer
Land ASAPL

22
Q

Free Turbine RPM indicator failure

A

check that NR reading remains within governed
range when collective pitch is slowly modified
with engine Tq > 0
continue flight

23
Q

HDY Yaw Servo Control Slide Valve Seizure in Hover

A

in Hover - if no yaw, land normally

if yaw - actuate collective HDY switch to cutoff HDY

24
Q

HDY Yaw Servo Control Slide Valve Seizure in Flight

A

reduce speed
enter sideslip if necessary
collective HDY switch OFF

25
Q

HDY Main Servo Control Slide Valve Seizure

A

collective HDY switch OFF
reduce speed to 60 kts
flat approach with run on no hover landing at walking speed ASAP
lock collective and shut down

AS350B2 (3 decks)

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