407 Limitations

Question 1

Limitation exceeded

Answer 1

Requires entry in helicopter logbook stating which limit, duration of time, extreme value attained and any additional info essentialin determining maintenance action required.

Question 2

Events that shall be recorded

Answer 2

• Torque events - a T/O or lift, internal or external load
• Landings
• Run-on landings shall be recorded separately.
  
  • A run-on landing is one where there is forward ground travel of the helicopter greater than 3’ with the weight on the skids.

Question 3

Max Cargo Loading Weight

Answer 3

Cargo on cabin deck - 75 lbs per ft²

Baggage compartment - 250 lbs with max 86 lbs per ft²

Cargo must be tied down. Must not obstruct exits for passengers.

Question 4

Night Flights

Answer 4

Functional flashlight is required.

Question 5

Doors removed

Answer 5

• Indicated altitude may be up to 100’ lower than actual altitude.
• Any combination of doors removed is approved.
• WIth litter door removed, left passenger door shall be removed.

Question 6

Max Gross Weight

Answer 6

Internal GW - 5000 lbs

GW with jettisonable external load - 6000 lbs

Caution

LOADS THAT RESULT IN GW ABOVE 5000 lbs SHALL BE CARRIED ON THE CARGO HOOK AND MUST BE JETTISONABLE.

Question 7

Minumim Weights

Answer 7

Min Gross Weight - 2650 lbs

Min @ fuselage station 65.0 (pilot) - 170 lbs

Question 8

V_NE

Answer 8

• 140 KIAS seal level to 3000’ H_D (DA)
  
  • Decrease for ambient conditions in accordance with A/S limits placards and decals
• 100 KIAS - At 93 to 100% torque (T/O power); not to exceed placard
• 100 KIAS or placard when T/O loading is in shaded area of the Gross Weight lateral C of G limits.
• 100 KIAS with any doors removed; not to exceed placard
• 100 KIAS or placard, whichever is less for steady state autorotation

Question 9

Sideward, Rearward Flight or Crosswind Hover V_NE

Answer 9

Maximum allowable airspeed for sideward and rearward flight or crosswind hover is 35 KTAS.

Question 10

Tailwind Operations

Answer 10

Sustained hover and vertical T/O & landing ops (>1 minute) with tailwind (relative wind ± 90° of tail) greater than 5 knots is prohibited.

Question 11

Max Altitude

Answer 11

20,000’ H_D or H_P, whichever is lower.

Question 12

Max Rate of Climb

Answer 12

2,000’ per minute

Question 13

Slope Landings

Answer 13

Nose up - 10°

Sides - 10°

Nose down - 5°

Question 14

Max Ambient Temp

Answer 14

At sea level 51.7°C (125°F)

Decreases 2°C (3.6°F) per 1000’.

Question 15

Min Ambient Temp

Answer 15

At all altitudes is -40°C (-40°F).

Question 16

ENG Anti-Ice

Answer 16

ON in visible moisture when OAT is below 5°C (40°F).

Question 17

Generator

Answer 17

Cont up to 10,000’ H_P - 0 to 180 Amps

Max cont up to 10,000’ H_P - 180 Amps

Cont above 10,000’ H_P - 0 to 170 Amps

Max continuous above 10,000’ H_P - 170 Amps

Transient 2 minutes - 180 to 300 Amps

Transient 5 seconds - 300 to 400 Amps

Question 18

Starter

Answer 18

Battery Start

60 seconds ON

60 seconds OFF

60 seconds ON

60 seconds OFF

60 seconds ON

30 minutes OFF

External Power Start

NOTE

28 VDC GPU for starting shall be limited to 500 amps.

40 seconds ON

30 seconds OFF

40 seconds ON

30 seconds OFF

40 seconds ON

30 minutes OFF

Question 19

Gas Producer (N_G)

Answer 19

Continuous - 63 to 105%

Max cont - 105%

Transient 10 seconds - 105.1 to 106%

Question 20

Power Turbine RPM (N_P)

Answer 20

Avoid continuous operations - 68.4 to 87.1%

Minimum - 99%

Continuous - 99 to 100%

Max continuous - 100%

Max transient 15 seconds - 102.1 to 107% N_P (107.3% in newer FM)

NOTE

ENGINE OVSPD warning light will illuminate when N_P versus TORQUE is between 102.1% N_P at 100% TORQUE and 108.6% N_P at 0% TORQUE.

When operating in MANUAL mode N_P should be maintained between 95 and 100%.

Question 21

MGT (Measured Gas Temp)

Answer 21

GAUGE P/N 407-375-001-101/-103

Continuous - 100 to 727°C

Max continuous - 727°C

5 minute T/O - 727 to 779°C

Max T/O - 779°C

Transient 12 seconds - 780 to 826°C

Max start - 927°C

< 10 seconds above 826°C

or 1 second at 927°C.

GAUGE P/N 407-375-001-105 AND SUB

Continuous - 100 to 727°C

Max continuous - 727°C

5 minute T/O - 727 to 779°C

Max T/O - 779°C

Transient 12 seconds - 780 to 905°C

Max start - 927°C

< 10 seconds above 843°C

or 1 second at 927°C.

Question 22

Torque

Answer 22

Continuous - 0 to 93.5%

Max continuous - 93.5 %

5 minute T/O - 93.5 to 100%

Transient 5 seconds - 105%

Question 23

Fuel Pressure

Answer 23

Minimum - 8 psi

Continuous - 8 to 25 psi

Maximum - 25 psi

Question 24

Engine Oil Pressure

Answer 24

Min below 79% NG - 50 psi

Min from 79 to 94% NG - 90 psi

Min above 94% NG - 115 psi

Max - 130 psi

Max cold starts only - 200 psi

NOTE

When 130 psi is exceeded during start, operate engine at idle until oil pressure drops below 130 PSI.

Question 25

Engine Oil Temp

Answer 25

Continuous - 0 to 107°C

Max - 107°C

NOTE

If hovering with a tailwind greater than 10 knots at OAT above 37.8°C (100°F), closely monitor engine oil temperature. The oil temperature may be reduced by either turning into wind, reducing power or transition to forward flight. (Older FM- 5 knots, 24°C and monitor ENG & XMSN oil temps)

NOTE

Positive temperature indication is when the second segment of the trend arc is illuminated.

Question 26

Transmission Oil Pressure

Answer 26

Min - 30 psi

Continuous - 40 to 70 psi

Max - 70 psi

Question 27

Transmission Oil Temp

Answer 27

Continuous - 15 to 110°C

Max - 110°C

Question 28

Rotor RPM

Answer 28

Power ON

Continuous - 99 to 100%

Max Continuous - 100%

NOTE

When operating in MANUAL mode NR should be maintained between 95% and 100%.

Power OFF

Minimum - 85%

Continuous - 85 to 107%

Max - 107%

Caution

FOR AUTOROTATIVE TRAINING, MAINTAIN STEADY STATE NR ABOVE 90%.

Question 29

Rotor Brake

Answer 29

N_R has decreased to 40% or lower.

For emergency stops, apply rotor brake any time after engine is shut down.