Engine Limitations ALF 502 R5

Question 1

STARTER MOTOR DUTY CYCLE
- Total start attempts and cooling time

Answer 1

5 total attempts:

• 60 seconds over first 3 starts with 1m cooling then 1hr cooling
• 40 seconds over last 2 starts with 1m cooling between then 4hrs cooling

Question 2

Max start TGT

Answer 2

849c up to 865c for 10 seconds

Question 3

Inflight start must not be attempted if N2 has indicated below 1% for more than __ minutes

Answer 3

7

Question 4

Normal in-flight start envelope is:
N2 __% or greater
Altitude ___ft or below
IAS between __ & __

If essential for safe flight, relights may be attempted up to __ft, airspeed down to __ KIAS and N2 down to __%

Answer 4

• N28% or greater
• 20 000ft or below
• between 185 or 240KIAS
• 25000ft
• 170Kias
• 7% N2

Question 5

Ground idle parameters:
N2 between
Min oil pressure
Max oil temperature

Answer 5

49 to 51% N2
25psi
133c

Question 6

Flight idle parameters:
ENG ANT-ICE OFF min N2
ENG ANT-ICE ON min N2
- abv 300ft agl
- blw 300ft agl

Answer 6

ENG ANT-ICE OFF 60% N2
ENG ANT-ICE ON 67% N2 above 300ft agl
60% N2 below 300ft agl

Question 7

MAX CONTINUOUS THRUST
- N1
- N2
- TGT

Answer 7

N1 97.0%
N2 96.9%
TGT 857c

Question 8

TAKEOFF THRUST
N1 steady and transient (10s)
N2 steady and transient (10s)
TGT steady and transient (15s)

Answer 8

N1 97% and 100% no more than 10s
N2 98.8 and 100% no more than 10s
TGT 882c and 904c no more than 15s

Question 9

Cool down period prior to shutdown below flight idle

Answer 9

2m

Question 10

Maximum N1 during high surface wind operation

Answer 10

55% N1