Engines Flashcards
Engine warmup limitation
Do not exceed 75% N1 for 2 minutes after start, or until all indications are in the normal range, whichever is longer
Engine cool-down limitation
Operate engines at or near idle for 2 minutes prior to shutdown
Max power on two engines limited to
5 minutes
APR power on 1 engine limited to
10 minutes
Before the first flight of the day, when the airplane is cold-soaked at an ambient temperature of -30c or below for more than 8 hours:
- engines must be motored for 60s and fan rotation verified before engine start is initiated
- thrust reversers must be actuated until the deploy and stow cycles are 2s or less
Min oil temperature for starting
-40c
Max continuous oil temp
155c
Max permissible oil temp
163c (15 mins max)
Steady state idle oil press
25 psi minimum
Takeoff power oil press
45 psi minimum
Max continuous oil press
95 psi max
Max transient oil press
156 psi when oil temp <60c
Max transient oil press after cold start
182 psi or amber dashes (max 10 mins)
Continuous ignition must be used:
1) TO & LDG on contaminated runways
2) TO with high x-wind (15 kts or more)
3) flight though mod or heavier RA
4) flight through mod or heavier turb
5) flight in vicinity of thunderstorms
Ground starter cranking limits
1: 90s on / 10s off
#2: 90s on / 10s off
#3+: 90s on / 5 min off
In-flight starter cranking limits
1: 2min on / 10s off
#2+: 1min on / 5 min off
Starter must not be engaged if N2 exceeds:
45%
Max ITT ground start
120c
Max ITT air start
90c
Dry-motoring cranking limits
1: 90s on / 5 min off
#2+: 30s on / 5 min off
Thrust reverser limits
During landing, max reverse prohibited below 75 KIAS and reverse idle should be achieved by 60 KIAS
Engine wind limit.
> 30 degrees
< 5 knots
No limitations - TOGA thrust may be applied before brake release but must be set by 60 KIAS
Engine wind limit.
> 30 degrees
Between 5 and 30 knots
A maximum of 75 % N1 may be applied before brakes release, then set TOGA thrust by 60 KIAS
Engine wind limit.
> 30 degrees
> 30 knots
Only idle/taxi thrust may be applied be for brakes release, then set TOGA thrust by 60 KIAS
Engine wind limitation.
<= 30 degrees
Wind speed unlimited
No limitations - TOGA thrust may be set before brakes release, but must be set by 60 KIAS
If static/ standing performance is generated but engine wind limits prevent static/standing takeoff:
A) if auto wind using METAR unavailable, enter winds manually in ACARS
B) if ACARS and cFDP no comm; dispatch must manually insert winds in TLR data
Flex thrust prohibited
1) anti-skid inop
2) contaminated runway
3) airplane has been de-iced
4) wing/cowl anti-ice in use
5) wind shear/downdraft warnings forecasted
6) engine cannot achieve full rated thrust
7) special departure demands TOGA
