B412 EP Limits

Question 1

N1 limits - twin eng operations

Answer 1

Continuous 61 - 103.2%

Max 103.2%

Question 2

N1 limits - OEI

Answer 2

Continuous 103.2 to 109.2%

30min 106.8%

2.5min 109.2%

Question 3

N2 limits

Answer 3

Min Cruise blw 6000ft 97%

Min hvr, T/O and climb 100%

Min Cruise abv 6000ft 100%

Ops with eng tqs at or blw 30% = 100 - 104.5%

Max eng with eng tq at/blw 30 = 104.5%

Question 4

ITT limits - twin eng ops

Answer 4

Continuous 300 - 810°C

Max cont 810°C

Max transient (5sec abv 810) = 940°C

Max start (2sec abv 960°C) = 1090°C

Question 5

ITT limits - OEI

Answer 5

OEI ops - 810 - 940°C

30mins 885°C

2.5mins - 940°C

Question 6

Eng Tq limits

Answer 6

Cont - 5-59%
Max twin - 59%
OEI - 59- 81%
30mins OEI - 77%
2.5min OEI - 81%

Question 7

Fuel px limits

Answer 7

Min - 4 PSI

Cont - 4 - 35 PSI

Max - 35PSI

Question 8

Eng oil px limits

Answer 8

Min flight idle = 40 PSI
Ops blw 79% N1 = 40 - 80 PSI
Cont = 80 - 115 PSI
Max = 115 PSI

Question 9

Eng oil temp limits

Answer 9

Min = 0 °C

Cont = 0 - 115°C

Mac = 115°C

Question 10

C’Box oil px limits

Answer 10

Min = 40 PSI
N2 blw 94% = 40 - 60 PSI
Cont = 60 - 80 PSI
Max = 80 PSI

Question 11

C’Box oil temp limits

Answer 11

Min = 0°C

Cont = 0 - 115°C

Max = 115°C

Question 12

Transmission oil px limts

Answer 12

Min = 30 PSI

Idle range = 30 - 40 PSI

Cont range = 40 - 70 PSI

Max = 70 PSI

Question 13

Transmission oil temp limits

Answer 13

Cont = 15 - 110°C
Max = 110°C

Question 14

Mast tq limits

Answer 14

Cont = 81%
T/O range (5mins) = 81 - 100%

Question 15

When should external power be used for start?

Answer 15

Volts at/blw 20

Question 16

What are the starter limits?

Answer 16

30s on
60s off
30s on
5min off
30s on
15mins off