Type of aircraft

Period

Probability distribution

Beta

Exponential

Gamma

Lognormal

Negative binominal

Normal

Poisson

p

q

Beta (1/λ)

Alpha

Beta

Mu (μ)

Sigma (σ)

k

p

Mean

Sigma

Lamda

Airplane (large/small)

3 months

1.1

31188.0

2.2

1.0

2.2

1.0

0.9

1

0.310

2.2

6.4

2.2

6 months

1.0

144431.0

4.4

1.7

2.7

1.2

0.9

1

0.184

4.4

8.8

4.4

1 year

1.2

21278.6

8.8

1.6

5.7

1.8

0.9

1

0.102

8.8

11.7

8.8

Small airplane

3 months

2.3

1391.2

1.3

1.0

1.3

0.9

0.7

1

0.444

1.3

2.0

1.3

6 months

1.9

215.1

2.5

1.0

2.5

1.0

0.7

1

0.286

2.5

2.9

2.5

1 year

1.9

45.6

5.0

3.4

1.5

1.5

0.8

3

0.375

5.0

4.3

5.0

Large airplane

3 months

0.3

1.2

1.0

1.0

1.0

0.7

1.3

1

0.502

1.0

6.1

1.0

6 months

0.3

1.2

2.0

1.0

2.0

0.8

1.3

1

0.335

2.0

8.5

2.0

1 year

0.7

8.8

4.0

1.4

2.9

1.0

1.4

1

0.201

4.0

11.8

4.0

Helicopter

3 months

1.5

2558.0

1.4

1.0

1.4

0.8

0.8

1

0.416

1.4

2.8

1.4

6 months

1.5

739.0

2.8

1.0

2.8

1.1

0.8

1

0.262

2.8

4.1

2.8

1 year

1.8

68579.0

5.6

2.5

2.3

1.5

0.7

2

0.262

5.6

5.7

5.6