Engine Limitations ALF 502 R5 Flashcards
STARTER MOTOR DUTY CYCLE
- Total start attempts and cooling time
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
Max start TGT
849c up to 865c for 10 seconds
Inflight start must not be attempted if N2 has indicated below 1% for more than __ minutes
7
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 __%
- N28% or greater
- 20 000ft or below
- between 185 or 240KIAS
- 25000ft
- 170Kias
- 7% N2
Ground idle parameters:
N2 between
Min oil pressure
Max oil temperature
49 to 51% N2
25psi
133c
Flight idle parameters:
ENG ANT-ICE OFF min N2
ENG ANT-ICE ON min N2
- abv 300ft agl
- blw 300ft agl
ENG ANT-ICE OFF 60% N2
ENG ANT-ICE ON 67% N2 above 300ft agl
60% N2 below 300ft agl
MAX CONTINUOUS THRUST
- N1
- N2
- TGT
N1 97.0%
N2 96.9%
TGT 857c
TAKEOFF THRUST
N1 steady and transient (10s)
N2 steady and transient (10s)
TGT steady and transient (15s)
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
Cool down period prior to shutdown below flight idle
2m
Maximum N1 during high surface wind operation
55% N1