AIRBUS H125 / AS350B3 (2B1 Eng) Performance and Information Flashcards
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MINIMUM BATT VOLTAGE DURING START PROCEDURE
22V
PROCEDURE IN CASE OF FAILED / ABORTED START
CRANKING
- Engine starting selector - OFF
- Emergency fuel shut-off lever - FORWARD
- Ng - CHECK below 10%
- [FUEL PUMP] - ON
- [CRANK] - PRESS for 20 sec. max
- [FUEL PUMP] - OFF
When starting the engine, the starter time is the time between selecting the engine starting selector to ON and the engine igniting.
When performing an engine ventilation, the starter time is the duration that the [CRANK] is pressed.
To prevent starter overheat damage, limit starter time to the following:
- 30 seconds ON - 60 seconds OFF
- 30 seconds ON - 60 seconds OFF
- 30 seconds ON - 30 minutes OFF
The 30 minutes cooling period is required before beginning another starting cycle
WHEN DOES THE UPPER VEMD CHANGE TO THE FLI DURING START?
WHEN N1 IS ABOVE 60%
CAN HEATING DEMISTING SYSTEM BE USED DURING TAKEOFF?
Yes, BUT
CAUTION
Use of heating and demisting is forbidden above engine maximum continuous rating (Ng or t4).
WHAT IS BEST CLIMB Vy?
Above 100 ft (30 m), for maximum climb performance, select up to MCP and optimum climbing speed (Vy):
IAS kt = 65 kt at 0 Hp - (1 kt / 1000 ft). IAS km/h = 120 km/h at 0 Hp - (2 km/h per 300 m)
WHEN IS THE FLIGHT REPORT PAGE DISPLAYED?
The “FLIGHT REPORT PAGE” automatically replaces the “VEHICLE” page when the VEMD detects the engine shutdown” and NR below 70 rpm status
FUEL CELL CAPACITY
and
(Usable Amount)
- 7 Gallons
- 1 Crash Resistant Fuel Tank Usable
YELLOW ZONE ON FUEL GAUGE
15.8 Gallons Remaining
15 Minutes Flight Time at MCP
DOES THE FUEL GAUGE YELLOW ZONE INCLUDE NON-USABLE FUEL?
NO
DEMONSTRATED WIND ENVELOPE FOR STARTING AND STOPPING ROTOR
(Not Limitation)
40 knots from any direction
50 knots for direct headwind
Hovering with winds from any direction up to 17 kt has been demonstrated over the entire flight envelope although it is not to be taken as a limit. For example hover at sea level at maximum gross weight and for all CG locations has been substantiated at 30 kt
WHEN MUST BLADES BE TIED DOWN (Wind)?
Above 40 kt
HOW DO YOU CHECK ENGINE POWER IN HOVER BEFORE TAKEOFF?
In HIGE at 5ft and before initiating forward flight, pull the collective pitch lever slightly to ensure that the Ng can increase by at least 1%, without exceeding the max. transient rating
HOW DO YOU PERFORM A FADEC/ENGINE HEALTH CHECK?
- The engine health check is performed in level flight MCP, heating and demisting system OFF.
- Prefer an altitude where the engine is operating close to the N1 MCP limit.
- Stabilize level flight MCP for at least 2 min. before initiating the engine health check.
- Read the results displayed on VEMD after the end of the procedure.
- The engine health check is satisfactory if:
- TRQ MARGIN / TOT is above 0%, “GOOD” displayed, and
- TRQ MARGIN / N1 is above 0%,“GOOD” displayed
DESCRIBE THE 3 ANCILLARY SYSTEMS
(PCB’s under the rear right passenger seat)
PCB1 - Fire warning lights, Aural NR warning horns, Gong
PCB2 - ENG chip, MGP chip, TGB chip caution lights, NR/NF signals, BATT TEMP warning light and processes VEMD electrical supply
PCB3 - EBCAU backup unit
CAN PILOT PERFORM AN EBCAU CHECK DURING FLIGHT OR ON THE GROUND?
NO
IS OUR GARMIN ACCEPTABLE FOR IFR FLIGHT?
NO, VFR only
WHAT TYPE OF ENGINE
Safran Arriel 2B1
SAFRAN ARRIEL 2B1 Power Rating
MTOP 847 SHP
MCP 747 SHP
ENGINE MODULES
LIST DIFFERENT WARNING SOUNDS
GONG - When a red warning appears on panel
CONTINUOUS HORN - When NR is below 360 rpm, When maximum takeoff limits are exceeded for more than 1.5 seconds
INTERMITTENT HORN - NR above 410 rpm
OVERALL LENGTH
from tip of rotor to tail
42.45’
ROTOR DIAMETER
35.07’
TR DIAMETER
6.1’ DIAMETER
Vy USED FOR TAKE OFF, LAND, APPROACH AND EMERGENCY MANUEVERS
65 Knots
MAXIMUM TEMP FOR HOT AIR DE-ICE
80c
AUTOROTATION FLARE HEIGHT
70 Feet
VEMD
(stands for)
Vehicle Engine Multifunction Display
WHAT VEMD SCREENS ARE AVAILABLE UNDER FLIGHT MODE?
- Engine
- Vehicle
- Flight Report
- HIGE
- HOGE
- Engine Power Check
WHERE ARE THE SCROLL BUTTONS LOCATED?
One on the collective
Right side of the VEMD unit
WHICH VEMD PAGE IS FOR THE ENGINE?
Top page
HOW MANY CHIP DETECTORS ARE ON THE ENGINE?
3
1 electrical
2 magnetic
HOW MANY FUEL PUMPS ARE THERE?
3
1 boost pump .5 bar
1 low pressure pump 10 bar
1 high pressure pump 40 bar
WHAT PART DOES THE OIL FILTER HAVE TO DO WITH THE FUEL SYSTEM?
Heats the fuel so anti ice additive is not needed
(anti ice, Prist, only needed if below -20c)
FADEC
(STANDS FOR)
FULL
AUTHORITY
DIGITAL
ENGINE
CONTROL
WHAT DOES
THE FADEC
DO?
- Automatic engine starting, preventing TOT overlimit
- Proportional integral power turbine speed control
- Protection against engine surge and flame out during transients
- Bleed valve monitoring
- Protection against N1 and TOT overlimits
- Failure detection and indication
- Engine Health Check
- N1 and N2 cycle counting
WHAT IS
THE EECU
ALSO KNOWN AS?
“FADEC”
FULL AUTHORITY DIGITAL ENGINE CONTROL
OR
“DECU”
DIGITAL ENGINE CONTROL UNIT
HOW IS THE
EECU SUPPLIED
POWER?
2 channel gas generator
driven independent
alternator
HOW IS FUEL FLOW DETERMINED AND ADJUSTED?
By the EECU
WHAT DOES THE
DUAL STAGE STEPPED MOTOR DO?
Provides fuel flow modulation by driving a metering valve in the engine’s ‘hydro-mechanical unit’
FADEC SYSTEM
FAILURES
3 LEVELS
LEVEL 1 - FLASHING YELLOW GOV LIGHT
Reset EECU if before start
In flight, continue to nearest maintenance center
Applicable maintenance before next flight
LEVEL 2 - SOLID YELLOW GOV LIGHT
Avoid operating at engine or torque limits, cautious flight
LAND AS SOON AS PRACTICAL
DO NOT START ENGINE
- Applicable maintenance before next flight*
- LEVEL 3* - RED GOV LIGHT (Total EECU failure, metering valve frozen. EBCAU has taken over
During start: IMMEDIATELY SHUT DOWN
Avoid operating at engine or torque limits, cautious flight
LAND AS SOON AS PRACTICAL
WILL THE AIRCRAFT START WITH THE ROTOR BRAKE OUT OF THE LOCKED POSITION?
NO
IS THE OVERHEAD FUEL CUT-OFF LEVER SAFETEY WIRED?
No, a plastic cover protects it
HOW MANY HYDRAULIC PUMPS?
2
Left hand gear driven for upper portion of servos
Right hand belt driven for lower portion of servos
DO THE HYDRAULIC PUMPS USE SEPARATE RESERVOIRS?
YES
WHAT IS THE PURPOSE OF THE ROTARY DISTRIBUTION VALVE?
If one of the systems fails, the two valves move as an independent unit and supply pressurized fluid and return
IN THE EVENT OF HYDRAULIC FAILURE HOW DO THE HYD ACCUMULATORS HELP?
There are NO accumulators
WHAT DOES
THE DAY
SETTING DO?
VEMD and CWP and DMP lights are set to normal brightness
Position lights on
WHAT DOES
NIGHT 1 AND 2
SWITCH DO?
2 shuts off compass light
VEMD and CWP lights are dimmed accordingly
Position lights on
WHEN DOES GEN TAKE OVER POWER PRODUCTION
When it produces .5 volt above battery
FAN OPERATION TEMP
On at 77c
Off at 68c
TR SHAFT SPEED
6000 RPM
WHY IS THE GPS
CRITICAL TO
THE FADEC?
It provides a clock for EECU exceedences or failures
DIFFERENCE BETWEEN SBT and SLT
SBT (Service Bulletin) Due to an incident or event
SLT (Service Letter) Information
