Engine Flashcards
What happens when the ignition switch is selected to OVRD?
Activates both igniters on the ground or in flight.
Can the igniters be turned off during flight?
The switch may be moved to the OFF position but the FADEC disregards the command.
What controls the engine?
FADEC
What controls engine starting and provides hung start, hot start, and no light off
protection?
The FADEC
Does the FADEC provide engine start protection?
Only on the ground for a hot start, hung start, or no light-off.
Is there protection for hot starts or hung starts during an in flight start?
No.
How are engine thrust ratings controlled?
By the FADEC.
What does the cyan line on the N1 gauge represent during approach? When does it
appear?
- The minimum N1 for bleed requirements in icing conditions.
* Configured for landing when anti-ice is ON
How is the N1 limit indicated on the EICAS?
It’s a red tickmark on the N1 gauge
What sources are available for engine starting?
- APU
- Ground source (huffer cart or air bottle)
- Opposite engine
- Windmill start
Where is external air for an air start connected? Will the crew have any indication when
external air is connected?
- Lower section of the wing fairing area.
* Duct pressure is shown on the MFD STATUS page.
What happens after 3 overspeed detection events within 30 seconds?
FADEC will not relight the engine
What does WML mean on the engine indication?
• Windmilling engine
• The FADEC has detected a flame-out and the autorelight system is actuating to restart the
engine.
Where can the crew check engine oil quantity?
On the MFD Status page.
What is ATTCS? What controls it?
• Automatic Takeoff Thrust Control System
• Provides max thrust reserve (RSV) according to current rate previously selected via the
MCDU on the T/O Dataset page.
• ATTCS is controlled by the FADEC and is available on takeoff and go-around.
• The selection is made on the MCDU - TAKEOFF DATA SET MENU page and the indication
is displayed on the EICAS as follows:
- ATTCS label in white - system is armed.
- ATTCS label in green - system is engaged.
• The engagement only happens when the thrust levers reach the TOGA SET position.
What will trigger an ATTCS event?
- N1 difference > 15% between engines
- Engine failure during takeoff or go-around
- Windshear detection
How can the Pilot command RSV power?
By moving the thrust levers to MAX position whenever the ATTCS is armed.
When is thrust reverse available?
Weight-on-wheels (ground use only).
Thrust reverser must be stowed below what airspeed?
60 KIAS
Thrust reverser must be stowed below what airspeed?
60 KIAS
When is the thrust reverser displayed and what do the colors mean?
- Whenever the thrust reverser is not stowed.
- Green REV = Fully deployed
- Amber REV = In transition
- Red REV = Discrepancy between selected and actual reverser positions
What position must the thrust levers be in to enable the thrust reverser trigger?
Idle.
If the thrust lever is placed in the MAX REV position and then released, it does what?
It is spring loaded back to the MIN REV position
What happens if a thrust reverser inadvertently deploys?
FADEC limits respective engine thrust to IDLE
Can you deploy the thrust reverser on an engine that has failed on the landing roll?
Yes, up to 30 seconds following the failure, then it is locked out
What is a Flexible Thrust Takeoff?
Reduced thrust takeoff based on assumed temperature.
What is the maximum flex allowed?
25% reduction
If you input a flex of 34 then change it to 39 how will it affect your N1 target?
It will drop your N1 target.
When are reduced thrust takeoffs prohibited?
- The runway is contaminated with standing water, slush, snow, or ice
- Windshear is present or suspected
- Performance mandates no FLEX
Can you FLEX with windshear advisories in effect?
No.
Does the use of “wet” runway analysis numbers take into account the increased
stopping distance which occurs on wet runways?
Yes.
If you turn the START/STOP to STOP in flight will the engine shutdown?
Not until the Thrust Lever is at idle.
If you turn the ignition to OFF in flight will the engine shutdown?
No, FADEC disregards the ignition selector knob OFF position in flight.
When is a crossbleed start used and what happens?
Used when the APU is not available, bleed air from one engine is used to start the other.
What happens to the bleed pressure during a crossbleed start?
Bleed pressure will drop and does not require the thrust lever to be adjusted to maintain
pressure.
Before applying takeoff thrust, allow the engines to warm up for a minimum of how
many minutes?
2 minutes
How long must an engine cool down prior to shutting it down?
2 minutes
What are the EICAS Engine Limit Display Markings?
- Red - Maximum and Minimum Limitations
- Amber - Caution Range
- Green - Normal Operating Range
