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Bell 407 Limitations
Bell 407 Limitations from Section 1 of Rotorcraft Flight Manual BHT-407-FM-1
35
Aviation
Professional
07/06/2013

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Term
Max Approved Internal Gross Weight
Definition
5000, or 5250 with flight manual supplement BHT-407-FMS-28
Term
Minimum GW for flight
Definition
2650
Term
Minimum weight at Fuselage Station 65.0
Definition
170 - this is the pilot/copilot station
Term
Maximum approved GW with external
Definition
6000
Term
Who is responsible for maintaining CG limits through out flight?
Definition
Pilot - can use ballast if needed
Term
Basic VNE at Sea level to 3000
Definition
140 kts - see air speed placard for additional limits
Term
VNE at 93.5 to 100% torque
Definition
100 kts or placarded speed
Term
VNE with any door removed
Definition
100 kts
Term
Max allowable airspeed for sideward and rearward flight or crosswind hover
Definition
35 kts
Term
Max operating altitude
Definition
20,000 ft
Term
Prohibited maneuvers
Definition
Aerobatic
Term
Max rate of climb
Definition
2000 ft/min
Term
Slope limitations
Definition
10 degrees sideways and nose up, 5 degrees nose down
Term
Max sea level ambient air temp for operation
Definition
+51.7 degrees C (125 degrees F)
Term
Minimum ambient air temp
Definition
-40 deg C (-40 deg F)
Term
ENG ANTI ICE shall be ON at and below what temp?
Definition
5 Deg C (40 deg F)
Term
Generator Limits
Definition

Continuous Ops: 0 to 180 amps

Max: 180 amps

Cont above 10000 ft: 0 to 170 amps Transient, 2 minutes: 180 to 300 amps Transient, 5 seconds: 300 to 400 amps

Term
Starter limits external power
Definition

40 sec ON 30 sec OFF,

3 times max,

then 30 minutes OFF

Term
Starter limits battery start
Definition

60 sec ON 60 sec OFF,

3 times max,

then 30 minutes OFF

Term
Gas producer RPM (Ng)
Definition

Continuous Ops: 63 to 105%

Max Cont: 105%

Transient: 105.1 to 106%

Term
Power Turbine RPM (Np)
Definition
Avoid Cont Ops ---------- 68.4 to 87.1
Minimum ------------------ 99%
Continuous Ops -------- 99 to 100%
Max cont ------------------ 100%
max transient 15 sec---- 102.1 to 107% Np
Term
NOTE - ENGINE OVSD Warning Light Illuminates when Np VS TQ
Definition
is between 102.4% Np at 100% TQ and 108.6% Np at 0% TQ
Term
MGT Limits
Definition
Cont Ops --------------- 100 to 727 deg C
Max Cont --------------- 727 deg C
Takeoff 5 min ---------- 727 to 779 deg C
Max for Takeoff -------- 779 deg C
Transient ---------------- 780 to 826 or 905 deg C depending on gage
Max Starting 10 Sec above --- 826 or 843 deg C depending on gage
or max 1 sec at --------- 927deg C
Term
Engine Torque Limits
Definition
Cont Ops -------------------- 0 to 93.5 %
Max Cont -------------------- 93.5 %
Takeoff, 5 Min -------------- 93.5 to 100%
Transient 5 Sec ----------- 105%
Term
Fuel Pressure Limits
Definition
Min ------------------- 8 PSI
Cont Ops ----------- 8 to 25 PSI
Max ------------------ 25 PSI
Term
Engine Oil Pressure
Definition
Minimum below 79% Ng-------- 50 PSI
Minimum from 79% to 94% Ng- 90 PSI
Minimum above 94% Ng-------- 115 PSI
Maximum -------------------------- 130 PSI
Maximum Cold Starts ---------- 200 PSI
Term
Engine Oil Temp
Definition
Cont Ops ---------------- 0 to 107 Deg C
Maximum ---------------- 107 deg C
Term
Transmission Oil Press
Definition
Minimum ---------------- 30 PSI
Cont Ops --------------- 40 to 70 PSI
Maximum --------------- 70 PSI
Term
Transmission Oil Temp
Definition
Cont Ops --------------- 15 to 110 deg C
Maximum --------------- 110 deg C
Term
Rotor RPM
Definition
Cont Ops ---------------- 99 to 100%
Maximum ---------------- 100%
Term
Rotor RPM - Power Off
Definition
Minimum ---------------- 85 %
Cont Ops --------------- 85 to 107%
Maximum --------------- 107%
Term
Fuel Ambient Temp limit - Jet A
Definition
-32 deg C (-25 Deg F)
Term
Baggage Compartment Weight Limits
Definition
max allowable ----------- 250 lbs
Per sq ft ------------------ 86 lbs
Term
Fuel Capacity
Definition
869 lbs (jet A at 15 deg C)
Term
Fuel Tank Limit Forward Tank empty
Definition
Forward Tank Empty ---------- 185 lbs
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