Maximum Permissible Weight
4961 lbs
VNE Power On, Doors Closed
155 knots (287kmh, 178 mph) at zero pressure altitude
Reduce by 3 knots per 1000 feet values marked in airspeed indicator
Reduce by 10 knots when OAT is below -30*c
VNE Power Off, Doors Closed
125 knots (231kmh, 144mph) at zero pressure altitude
Reduce by 3 knots per 1000 feet at higher altitudes
Reduce by 20 knots when OAT is below -20*C without dropping below 65 knots
VNE Doors Open or Removed
VNE or 110-100 knots depending on config. Whichever is less
Maximum Operating Altitude
20000 ft pressure altitude
Temperature Limitations
Minimum Temperature -40*C
Maximum Temperature ISA 35C to 50C
Maneuvering Limitations
Continued operations in servo transparency is prohibited
WARNING
Servo transparency could lack to a hazardous situation at low clearance from ground. Particularly during right turn maneuver.
Fight in Falling Snow
Authorized if visibility is greater than 1500m (0.81 nm)
Flight in 800-1500m visibility limited to 10 minutes
Flight in visibility less than 800m prohibited
Refer to Sup.4.
Main rotor limitations Power On
On ground, Low pitch: 380 +- 5 rpm
In stabilized Flight: 390 +4/ -5 rpm
Main Rotor Limit Power Off
Maximum: 430 rpm
Minimum: 320 rpm
Note
Horn sounds when rotor speed is:
Below 360 rpm (continuous sound)
Above 410 rpm (intermittent sound)
Rotor Brake Limitation
Maximum speed brake applied: 170 rpm
Minimum time between two consecutive brake applications: 5 minutes
Torque Limitations
When airspeed is lower than 40 knots:
Max transient torque - 107% for 10 seconds
Max continuous torque - 100%
When airspeed is equal to or higher than 40 knots:
Max continuous - 94%
Engine Limitations
The aircraft is equipped with a TURBOMECA “ARRIEL 1D1” engine. Operating limitations are determined by the gas generator rotation speed (Ng), by the exhaust gas temperature (t4) or by the free turbine rotation speed (Nf) depending on the operating conditions. Use of heating* and demisting is forbidden above the engine maximum continuous rating (Ng or t4).
Gas Generator Speed
Max transient: Ng 107.5% - 🔺Ng = +6 less than 5 seconds
Max Take Off without P2 Air Bleed: 🔺Ng 0
Max Take Off with P2 Air Bleed: 🔺Ng -0.6
Max continuous Ng = 98% - 🔺Ng -3.5
Note
100% Ng corresponds to 51800 rpm
T4 Temperature Limit
Max Start Up - 795*C
Max Transient (5 seconds) - 865*C
Max Take Off - 845*C
Max Continuous - 795*C
Free Turbine Speed
Max Continuous equivalent: 417 rpm
Transient Limit (5 seconds) :
Minimum 330 rpm
Max 463 rpm
Note
A rotor speed of 394rpm corresponds to a free turbine speed of 42452 rpm
Fuel Pressure Limits
In event of fuel filter clogging: less than 0.4 bar
Illumination of the pre clogging caution light at differential pressure of 0.2 bar.
Note
The filter is equipped with a clogging indicator
Prohibited Manoeuvres
Auto rotational landing training without engine shut down
Intentional de-synchronization of the engine (torque lower than 10%)
Intentional engine shutdown in flight. (Marking on instrument panel)
Caution this page must only be removed after incorporation of MOD. TU 221.
Engine Oil Pressure
Minimum Pressure above 85% Ng: 1.8 bar (26psi)
Minimum Pressure between 70-85% Ng: 1.3 bar (18.9 psi)
Max Pressure outside of starting sequence: 5 bar (72.5 psi)
Engine Oil Temperature
Max oil temp: 115*C
Minimum oil temperature (before power application): 0*C
DC Electrical System
Normal Voltage: 26-29V
Max Voltage: 31.5V
Max Current: 150 amps
Landing on Slopes
Nose up: 10*
Nose down: 6*
Sideways: 8*
Prohibited Restrictions
Aerobatic maneuvers
Engine starting when snow or ice is accumulated in or around air intake
Fight in icing conditions
Engine power reduction in flight using throttle (except for auto rotational training)
Starter/Gen Limits
30 seconds on
1 minute off
Two attempts allowed before having to wait 30 minutes for starter Gen cool down
