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Flashcards in Bell 407 Deck (75):
1

Max Gross Weight

5250

2

Min. Weight

2650 lbs.

3

VNE

Basic 140 Kts. SL to 3000

4

VNE 93.5% to 100%

100 kts

5

Max Service Ceiling

20,000 ft

6

Max sea level Temperature

125*F

7

Minimum operating Temprature

-40*F

8

Max continuous generator amps

180 up to 10,000
170 above 10,000

9

Transient generator amps

180-300 2 minutes
300-400 5 seconds

10

Starter Limitations GPU/APU

External.
40 sec on.
30 sec off
40 sec on
30 sec off
40 sec on
30 min off

11

Starter Limitations Battery

60 sec on
60 sec off
60 sec on
60 sec off
60 sec on
30 min off

12

Power Plant

Rolls Royce 250-C47B

13

GPU Starts

28VDC @ 500 AMPS

14

NG Limits

Continuous: 63-105%
Max: 105%
Transient: 105.1 to 106% @ 10 sec

15

NP Power Turbine Limits

Max Continuous: 100%
Max: 99 - 100%
Transient: 102.1 - 107.3% @ 15 sec.

16

MGT Limitations

Continuous : 100c to 727c
Max Continuous: 727c
T/O 5 minutes: 727-779c
Max T/O: 779c
Transient: 780-826c @ 12 sec.

17

MGT Start Limitations

10 sec above 843c Max to 927c for 1 sec.

18

MGT Limits

Continuous operation
Maximum continuous
Takeoff, 5 minutes
Maximum for takeoff
Transient, 12 seconds
Maximum starting, do not exceed 10 seconds above 843°C or 1 second at 927°C.
100 to 727°C 727°C
727 to 779°C 779°C
780 to 905°C 927°C

19

Engine Torque Limits

Continuous operation Maximum continuous Takeoff, 5 minute Transient, 5 seconds
0 to 93.5% 93.5%
93.5 to 100% 105%

20

Fuel Pressures

Min. 8 psi
Continuous. 8-25 psi
Max. 25 psi

21

Engine Oil Pressure

Minimum below 79% NG
Minimum from 79 to 94% NG
Minimum above 94% NG Maximum
Maximum cold starts only
50 PSI 90 PSI
115 PSI 130 PSI 200 PSI

22

Oil Temps

Continuous. 0-107c
Maximum 107c

23

Transmission Oil Pressures

Min. 30 psi
Continuous 40 to 70 psi
Max. 70 psi

24

Tranmission Oil Temprature

Continuous 15 to 110c
Max 110c

25

Rotor Power ON

Continuous 99-100%
Max Continuous 100%

26

Rotor Power Off

Min. 85%
Continuous Operation. 85 to 107%
Max. 107%

27

Rotor Limits in Manual Mode

95 to 100%

28

NR for Steady State Auto Rotation

Above 95% NR

29

Rotor Brake Limits

Below 40% NR

30

CG Limits Longitudenal

Basically 119 to 125 depending on GW

31

CG Lateral Limits

- 2.5 Left
+ 3 Right

32

Fuel Capacity (basic AC)

127 gal. usable./869 lbs.
w/ aux kit: 147 gal. usable / 1005 lbs.

33

Max Baggage Compartment

250 lbs @ 86 lbs per sq inch floor loading

34

Air Speed Limits Min Decent Max Glide

Min rate of decent 55 kts
Max glide 80 kts

35

Hydraulic Failure

Reduce airspeed to 70 to 100 kts
Hydraulic Circuit Breaker Pull if hydraulic power not restored back in. If power not restored hydraulic switch to OFF, land as soon as practical. Perform run on landing at ETL approx 15 kts.

36

Low Fuel Light

100 lbs + or - 10 lbs. = 15 minutes or less

37

Fuel Endurance

330 PPH = 2.4 hrs.
5.5 # per Minute

38

How many MR Chip detectors does the B407 have?

3,
1 upper case
1 lower case
1 FWD freewheeling housing

39

What type,of MR system does the B407 have?

4 blade soft plane

40

What is the Main Rotor diameter of the Bell 407?

35 feet

41

What is the MR hub constructed of?

glass/epoxy composite w/elastomeric bearings and dampeners which require no lubrication.

42

What are the MR Blades constructed of?

They are a composite design constructed of glass/epoxy, spar, skins with a nomex core after body, with a nickel plated stainless steel leading edge strips.

43

What type of T/R is system is installed on the B407?

The T/R is a 2 bladed teetering design, which has a 5.42 diameter. The tail rotor is mounted on the left side and rotates clockwise.

44

What type of bearings are incorporated in the Tail Rotor?

Elastomeric, flapping and stops.

45

What are the T/R blades constructed of?

Composite

46

What is the T/R gearbox reduction and speed of rotation (rpm).

Gear reduction of 2.53 to 1, input rpm of 6317 and output rpm of 2500 rpm.

47

At what % does the low rotor light and horn activate?

NR >95%, or <107%, no horn will sound on the high side, only a light.

48

What is the function and purpose of the cyclic centering light?

When the cyclic is not centered a caution light will illuminate to prevent damage to the rotor hub. This light will only illuminate with the collective down and the aircraft on the ground.

49

What does the acronym PRCU stand for?

Pedal Restrictor Control Unit

50

Briefly what is the function and purpose of the PRCU.

The PRCU utilizes signals from speed sensors to activate a attenuating rotary solenoid to restrict left anti-torque pedal inputs.

51

What two systems does the PRCU rely on for speed inputs?

Pitot and Static System

52

At what airspeed does the Pedal Restrictor engage the left pedal stop?

55 KIAS +\- 5 KIAS

53

At what airspeed will the Pedal Restrictor retract and permit full T/R authority?

50 KIAS +/- 5 KTS

54

Does the Pedal Restrictor incorporate any visual queues or warnings?

Yes, when fully engaged a message will illuminate on the annunciator panel "ENGAGED"

55

At what PSI does the hydraulic system operate at normally?

1000 psi

56

How many hydraulic filters are there on the Bell 407?

2, one on pressure side and one on the return side.

57

Does the B407 hydraulic system utilize a bypass system?
What is unique about the bypass feature?

Yes, but only the return side incorporates a bypass for the filters.

58

At what PSI will the High Pressure relief valve open?

1225 psi +/- 150 psi

59

The hydraulic high pressure relief valve is normally closed, after it opens at what pressure will it reset?

When pressure drops below 1075 psi.

60

What indication does the PIC utilize to determine when a hydraulic filter is approaching a impending clogged condition?

Each of the two filters is equipped with a small red button (LRB).

61

At what pressure will the hydraulic filter LRB pop?

70 psi +\- 10 psi

62

When will the hydraulic caution light illuminate?

When pressure drops below 650 psi -/+ 100 psi.

63

What are the major components of the electrical system.

Battery (24vdc), starter/gen, DC control unit, voltage regulator, relays, 28vdc buss, circuit breakers.

64

What is absolutely essential to remember when executing a GPU start?

If the start was accomplished with battery off, make sure and turn it on prior to removing the GPU power. DO NOT attempt to power the system if GPU power was removed prior to turning battery on.

65

What procedure MUST be completed if a GPU start was accomplished with battery off and GPU power removed with out the battery first turned on?

Shut down engine, perform Piston parking procedure,ensure proper voltage and restart.

66

what is best glide airspeed in the 407?

80 Kts

67

What is the minimum rate of decent in the B407?

55 kts.

68

What speed is the maximum for Doors off?

100kts

69

What is the maximum for sideward or rearward flight?

35 kts.

70

What are the slope landing limitations of the B407?

10 degrees - Left, Right, tail down.
Nose down 5 degrees.

71

How many hydraulic filters are there in the B407?

2, one on the pressure and one on the return.

72

At what differential pressure will the hydraulic filters LRB, pop?

70 +/- 10 psi.

73

Can temperature play a role in the LRB’s popping in the hydraulic system of the 407?

Yes, ambient temperatures 35f and below can cause them to pop.

74

Where can you find the authority for the GW of 5250?

FMS 28

75

At what pressure will the relief valve open to protect the hydraulic system from over pressure?

1225 psi +/- 150 psi and will close and reset at 1075 psi.