Engine Operational Limits

Question 1

Engine’s

Answer 1

GE CF34-8E5 takeoff thrust time limit to 10 Min

Question 2

N1

Answer 2

Min - Max 99.5%

Question 3

N2

Answer 3

Min 58.5% Max 99.4%

Question 4

ITT

Answer 4

Start Max 815 C
Maximum takeoff and go around 990 C
                  Time limit 10 min
                  Can be exceeded up to 1006 C first 2 Min
Maximum Continous 960 C

Question 5

Oil Pressure

Answer 5

Min 25 PSI Max 95 PSI

Question 6

Oil Temperature

Answer 6

Continous 155 C

Transient 163 C (Above 155 C limited to 15min)

Question 7

EICAS

Answer 7

RED - max & min limitations
AMBER - Caution range
GREEN - Normal operating range

Question 8

Flex power

Answer 8

Reduction must not exceed 25% of the full takeoff thrust
Flex prohibited on contaminated runway
ATTCS must be ON for all takeoff and landings

Question 9

Engine Starter Duty Cycles

Answer 9

1st/2nd Attempts 90 sec ON / 10 sec OFF
3rd/4th/5th Attempts 90 sec ON / 5 min OFF
120 sec ON in flight

Question 10

Dry motoring duty cycle limits

Answer 10

1st Attempt 90 sec ON / 5 min OFF
2nd/3rd/4th/5th 30 sec ON / 5 min OFF
*After 5 cycle may be repeated after 15 min cool down