Engine Systems

Thrust rating of the engine

N₁ RPM above which the EGT/RPM warning illuminates?

Max N₂ RPM at MRT

Max N₂ RPM for transient accelerations

Max continuous N₂ RPM

N₂ RPM not to be exceeded in manuel fuel control in order to prevent N₁ overspeed below 20,000 ft

N2 RPM not to be exceeded in manuel fuel control in order to prevent N1 overspeed above 20,000 ft

Approach IDLE, minimum RPM gear down and no WOW

% RPM at which bleed valve closes during initial engine acceleration

IDLE RPM range on standard day (after bleed valve closes)

NOTE 1

IDLE RPM which should be obtained within 30 sec after selecting IDLE

RPM at which ignition is turned off

RPM at which GTS automatically shuts down

Approximate RPM at which bleed valve opens during initial engine shutdown

RPM at which READY and GTS advisory lights are extinguised

RPM above which ATS start valve is inhibited from opening (to reduce gear stress on ATS clutch)

Minimum N₂ RPM required for engine start

Approximate increase in IDLE RPM after compressor bleed valve closes

Maximum shift in IDLE RPM between poststart and engine shutdown checks (NOTE 4)

Increase allowed IDLE RPM for each 1,500' altitude and every 10^oC in ambient temp (NOTE 4)

EGT above which the EGT/RPM warning illuminates

Maximum EGT for transient accelerations

Max EGT at MRT

Max continuous EGT limit

Max EGT during ground start (NOTE 2)

Max EGT during air start (NOTE 3)

Max EGT at IDLE

Firewire temperature required for FIRE warning light to illuminate

Firewire temperature required for TAILPIPE HOT warning to illuminate

Approximate decrease in EGT after compressor bleed valve closes

Maximum overshoot above 600^oC during airstart (10 seconds max)

Max overshoot above 550^oC during ground start (10 seconds max

Max time limit at MRT

Minimum interval after three GTS start attempts

Minimum interval between each GTS start attempt

Time bleed valve remains open after GTS assisted start using manual fuel

Max time ignition system can remain on 

Time that firewire must remain below 300^oC for FIRE warning to go out

Time allowed for GTS to reach GTS IDLE before automatic shutdown

Time ignition system remains on after GTS button release during airstart

Max allowable time for GTS advisory light to illuminate while in flight

Max time for EGT to remain above 600^oC during transient accelerations

Max allowable time for GTS advisory light to illuminate at sea level

Max allowable time for READY advisory to illuminate

Max allowable time engine light-off after moving throttle to IDLE

Max time for EGT to remain normal limit during ground start/airstart (for 20^oC overshoot)

Px below which the LP PRESS caution light illuminates

Oil px differential below which the OIL PRESS caution light illuminates