Indication: - Increase in NR - Increase in N2 - Increase in N1 - Increase in torque Recovery: - Retard throttle - N1 or N2/NR (attempt to stabilize with throttle and collective) - Monitor TOT for normal operation - NR maintain at 90-107% with throttle and collective If unable to maintain N1,N2,NR prepare for power off landing and shit off engine - Enter autorotation - Close throttle - FUEL VALVE switch OFF - Accomplish Autorotative Descent Procedure

Bell 206 L3/L4 EP's Flashcards by Brian Post

EP: Engine Failure: Hovering

Indication:

Left Yaw
ENG OUT Light Illuminates
Engine Instruments indicate powerloss
ENG OUT Audio when N1 below 55%
NR decr. with ROTOR LOW RPM light and audio on when NR below 90%

Recovery:

Maintain Collective
Control Yaw with Pedals
Increase Collective to Cushion Landing
Complete Helicopter Shutdown

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EP: Engine Failure: In-Flight

Indication:

Left Yaw
ENG OUT Light
ENG OUT Audio when N1 below 55%
NR Decre. with ROTOR LOW RPM light and audio on when NR below 90%

Recovery:

Enter Autorotation
Attempt Restart if Altitude permits
If engine doesnt restart
Throttle closed
FUEL VALVE switch OFF
Maintain heading and attitude
Collective adjust to maintain 90-107% NR
Cyclic adjust for airspeed
Flare to lose airspeed
Apply collective as flare effect decreases to reduce speed and cushion landing
Complete helicopter shutdown

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Autorotation: Minimum rate of descent airspeed

52 KIAS (60 MPH)

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Autorotation: Max glide distance airspeed

69 KIAS (80 MPH)

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Autorotation: Nominal autorotative airspeed

61 KIAS (70 MPH)

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Autorotation: Max airspeed

100 KIAS (115 MPH)

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Autorotation: Whats minimum NR % needed by time you make level touchdown

70%

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EP: Engine Restart In-Flight

Procedure:
-Adjust collective to maintain 90-107% NR
-Adjust airspeed as desired
*52 KIAS with minimum NR allow pilot more time
-Close throttle
-FUEL VALVE switch ON
-STARTER button Press and Hold
*If N1 is below 30% throttle shall be modulated to prevent exceeding TOT
-Throttle to Idle
-TOT modulate throttle to maintain 716-768 or 716-826(If red triangle)
-Throttle advance smoothly to full open position
*If restart unsuccessful abort and secure engine
-Throttle closed
-FUEL VALVE switch OFF
-
-
-

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EP: Engine Underspeed

Indication:

Decrease in N1
Subsequent decrease in N2
Possible decrease in NR
Decrease in Torque

Recovery:

Adjust collective to maintain 90-107%
Confirm throttle full open
If unable to maintain NR establish autorotative glide.
Enter Autorotation
Throttle closed
FUEL VALVE switch OFF
Maintain heading and attitude
Collective adjust to maintain 90-107% NR
Cyclic adjust for airspeed
Flare to lose airspeed
Apply collective as flare effect decreases to reduce speed and cushion landing
Complete helicopter shutdown
Prepare for poweroff landing
If engine underspeeds but still operates dont shutdown. Helps tail rotor effectiveness.

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EP: Engine Overspeed

Indication:

Increase in NR
Increase in N2
Increase in N1
Increase in torque

Recovery:

Retard throttle
N1 or N2/NR (attempt to stabilize with throttle and collective)
Monitor TOT for normal operation
NR maintain at 90-107% with throttle and collective
If unable to maintain N1,N2,NR prepare for power off landing and shit off engine
Enter autorotation
Close throttle
FUEL VALVE switch OFF
Accomplish Autorotative Descent Procedure

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EP: Engine Compressor Stall/Surge

Indication:

Engine pops
High or erratic TOT
Decreasing or erratic N1,N2
Torque oscillations

Recovery:

use bollective and reduce power, maintain slow cruise flight
TOT &N1 check for normal indications
ENGINE ANTIICING switch ON
PARTICLE SEP PRG switch ON
HEATER switch ON
Decide if its bad enough you need to shutdown engine
Continued flight
Increase collective slowly to achieved desired power
TOT & N1 montior for normal response
Land as soon as practical
Decide to shutdown
Enter autorotation
Close throttle
FUEL VALVE switch OFF
Accomplish AUTOROTATIVE DESCENT PROCEDURE

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EP: Engine Hot Start/Shutdown

Indication:

Excessive TOT
Visible smoke or fire

Recovery:

Close throttle
FUEL VALVE switch OFF
STARTER button press to motor engine until TOT stabilizes at normal temp
Complete helicopter shutdown

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EP: Engine Oil Pressure Low, High, Or Fluctuating

Indication:

Engine oil pressure below minimum
Engine oil pressure above max or flucuating abnormally

Recovery:

if eng oil pressure is below minimum montitor eng oil pressure and temp. Land as soon as possible
if eng oil pressure is above max or fluctuating monitor oil pressure and temp. Land as sson as practical

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EP: Engine Oil Temp High

Indication:

Engine oil temp increasing above normal
Engine oil temp above max

Recovery:
-Land as soon as practical

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EP: Driveshaft Failure

Indication:

Left yaw
Rapid decrease in NR
Rapid increase in N2
ROTOR LOW RPM audio horn and light
Possible increase in noise level

Recovery:

Accomplish AUTOROTATIVE DESCENT PROCEDURE
To maintain tail rotor effectiveness do not shutdown engine
Complete helicopter shutdown

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EP: Engine Fire On Ground

Indication:

Smoke
Fumes
Fire

Recovery:

Close throttle
FUEL VALVE switch to OFF
BAT switch OFF
Engage rotorbrake
Exit Helicopter

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EP: Engine Fire During Flight

Indication:

Smoke
Fumes
Fire

Recovery:

Immediately enter autorotation
Close throttle
FUEL VALVE switch to OFF
If time permits LH & RH boostpump CB pulled
Accomplish AUTOROTATIVE DESCENT PROCEDURE
BAT switch OFF

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EP: Cabin Smoke Or Fumes

Indication:

Smoke
Fumes

Recovery:

Inflight
Start descent
HEATER switch OFF
All vents open
Open side windows
if time and altitude permits
attempt to identify source
if identified and smoke and fumes still persist land as soon as possible
if identified and smoke and or fumes are cleared land as soon as practical

EP: Complete Loss Of Tail Rotor Thrust: Hovering

Indication:

Uncontrollable yawing to right
Nose down tucking
Possible roll of fuselage

Recovery:

Hovering
Reduce throttle and perform hover auto

EP: Complete Loss Of Tail Rotor Thrust: In-Flight

Indication:

Uncontrollable yawing to right
Nose down tucking
Possible roll of fuselage

Recovery:

Inflight
Reduce throttle to idle
Immediately enter auto
Maintain minimum airspeed of 52 KIAS
When no suitable landing spot controlled flight at lower power setting can be done and sufficient airspeed

EP: Fixed Pitch Tail Rotor: Hovering

Indication:

Lack of directional response
Locked pedals

Recovery:

Hovering
dont close throttle unless severe right yaw occurs
can land under power but more dangerous
Before landing best to do hover auto

EP: Fixed Pitch Tailrotor: In-Flight Left Pedal Applied

Indication:

Lack of directional response
Locked pedals

Recovery:

In high power condition helicopter will yaw to left when power is reduced.
Adjust power and airspeed as needed
Establish power on approach at low airspeed(zero if needed)
raise collective to cushion landing minimizing yaw

EP: Fixed Pitch Tailrotor: In-Flight Right Pedal Applied

Indication:

Lack of directional response
Locked pedals

Recovery:

In cruise or reduced power situation helicopter will yaw to right when power is increased.
At low power run on landing is necessary by gradually reducing throttle to maintain heading while adding collective to cushion landing
If right yaw is excessive close throttle completely

EP: Hydraulics: Loss Of Hydraulic Pressure

Indication:

Grinding or howling noise from pump
Increase in force requ. to move controls
Feedback forces may be evident during control movement
Cyclic and collective movements are rate limited

Recovery:

Reduce speed to 61-69 (L3) 60-80 (L4)
HYDR SYSTEM cb out (if hyd power is not restored push cb in)
HYDRAULIC SYSTEM switch ON (OFF if hyd power is not restored
Land as soon as practical
Run on landing at approximately 9 GIAS recommended

EP: Hydraulics: Flight Control Actuator Malfunction

Indication: - Uncommanded flight control movements - High flight control forces to oppose movement in one axis - Feedback forces only in affected flight control axis - Flight control forces normal in unaffected axis Procedure: - Maintain attitude - HYDRAULIC SYSTEM switch OFF - Airspeed 61-69 (L3) 60-80 (L4) - HYDR SYSTEM cb out (if hyd power is not restored push cb in) - HYDRAULIC SYSTEM switch ON (OFF if hyd power is not restored - Land as soon as practical - Run on landing at approximately 9 GIAS recommended

EP: Generator Failure

Indication: - GEN FAIL light - DC loadmeter indicates 0% load Recovery: - GEN FIELD & GEN RESET cb check in - GEN switch RESET then to GEN - If power not restored place GEN switch to OFF - Land as soon as practical * 80% battery with all electrical equipment off should make fuel boost pump last 3hrs * Night flight approximately 1hr of battery power available

EP: Excessive Electrical Load

Indication: - DC Loadmeter indicates excessive load - Smoke or fumes Recovery: - GEN switch OFF - BATT switch OFF - LEFT FUEL BOOST cb check in

EP: Fuel Transfer Failure

Indication: -FWD cells fuel qty stays constant approximately 195.8 pounds and below Recovery: -Determine FUEL QTY in forward cells Subtract qty of fuel trapped in fwd tanks to determine useable fuel *86.3 lbs will stay trapped in forward tank -Plan accordingly

BATT HOT warning light

Indication: - Battery overheating - Temp at 60 c or higher Recovery: - Turn BATT switch OFF and land as soon as practical - If BATT RLY caution light comes on land as soon as possible

LITTER DOOR OPEN warning light

Indication: -litter door not secure Recovery: - Close door securely before flight * If inflight - Land as soon as practical

ENG OUT warning light

Indication: - N1 less than 55 +/- 3% RPM - N2 Decreasing Recovery: - Verify engine condition - Accomplish engine failure procedure

ROTOR LOW RPM caution light

Indication: -ROTOR below 90% Recovery: - Reduce collective and ensure throttle full open - When above 90% light and audio should cease

TRANS OIL PRESS caution light

Indication: -XMSN OIL press is below minimum Recovery: - Reduce power - Verify fault with gauge - Land as soon as possible

TRANS OIL TEMP caution light

Indication: -XMSN OIL temp is at or above red line Recovery: - Reduce power - Verify fault on gauge - Land as soon as possible

BATTERY RLY caution light

Indication: -BATT RLY malfunctioned but will not drop offline Recovery: -If BATT HOT light comes on to land as soon as possible

FUEL LOW caution light

Indication: -Approximately 50-75 lbs fuel remain (10minutes) Recovery: - Verify FUEL QTY - Land as soon as practical

ENG CHIP caution light

Indication: -Ferrous particles in engine oil Recovery: -Land as soon as possible

TRANS CHIP caution light

Indication: -Ferrous particles in transmission oil Recovery: -Land as soon as possible

FUEL FILTER caution light

Indication: -Airframe fuel filter in impending bypass Recovery: -Land as soon as practical

T/R CHIP caution light

Indication: -Ferrous particles in trgb oil Recovery: -Land as soon as possible

GEN FAIL caution light

Indication: -Generator not connected to DC Buss Recovery: - Verify fault with loadmeter - GEN switch RESET then GEN to ON - If GEN FAIL light remains GEN switch OFF - Land as soon as practical

R/FUEL PUMP caution light

Indication: -Right pump of dual boost pump assy failed Recovery: -Descend below 6000 feet pressure altitude if flight permits

L/FUEL PUMP caution light

Indication: -Left pump of dual boost pump assy failed Recovery: -Descend below 6000 feet pressure altitude if flight permits