Engines Flashcards
Which two engine indications are displayed full time on the EICAS?
N1 & EGT
FCOM 2 7.10.1
State the sequence of events that occur when you pull a start switch with the AUTOSTART switch ON
It arms the start valve and opens the engine bleed air valve.
FCOM 2 7.20.6
State the sequence of events that occur when you pull a start switch with the AUTOSTART switch OFF
It opens the start and engine bleed air valves only.
FCOM 2 7.20.8
Which two valves close at 50% N2 RPM during engine start?
The start and engine bleed air valves close at 50% N2
FCOM 2 7.20.6
What is the function of the AUTO ignition selectors in the SINGLE position?
Only one igniter will be energised per engine during start on the ground, it alternates automatically between igniters on successive starts.
FCOM 2 7.13.15
What is the function of Standby (STBY) IGNITION selector in NORM?
AC power system supplies power to selected igniters backed up by the standby power system to both igniters if AC power is lost.
FCOM 2 7.13.4 / 7.20.8
What happens when you turn the continuous (CON) IGNITION switch ON?
The selected igniters operate continuously
It commands approach idle minimum
FCOM 2 7.13.4
When is ignition selected for each engine individual?
When the start switch is out
Nacelle anti ice is on
A flameout is detected.
FCOM 2 7.20.8
When is ignition selected for all engines?
When trailing edge flaps are out of the up position or CONT IGN switch is ON
FCOM 2 7.20.8
What Color does the EGT change to if the EGT start limit is exceeded?
Red
FCOM 2 7.10.8
What does “X-BLD” mean when displayed next to the N2 indication when an engine is shut down?
X-BLD displays next to N2 if crossbleed air is necessary for start
FCOM 2 7.20.6
How many igniters are selected for ground start, and how many for inflight start?
One for ground start, two for inflight start
FCOM 2 7.20.6
Describe the engine start sequence with the AUTOSTART switch ON
The EEC opens the start valve and the start light illuminates
At a predetermined N2, the EEC opens the fuel metering valve and energises the selected igniter.
Starter cutout occurs at 50% N2
At cutout, the start switch is released to the in position
The start and bleed air valves close
The start light extinguishes
Ignition discontinues
FCOM 2 7.20.7
During an engine start, the AUTOSTART system can abort the start for which three malfunctions?
Hung start
Hot start
No EGT rise
FCOM 2 7.20.7
Which two parameters does the AUTOSTART system not monitor?
Oil pressure & N1 rotation
FCOM 2 7.20.7
How does the EEC protect against an impending hot start, hung start, or no EGT rise?
It cuts off fuel, adjusts the fuel schedule, then reapplies fuel for another attempt.
The EEC makes 3 attempts before aborting. The engine will motor for another 30 seconds after fuel and ignition are cut off.
FCOM 2 7.20.7
At what EGT limit does the EEC abort an inflight start through the AUTOSTART system?
Red line?
How is the engine cooled?
By the engine oil system.
Oil is cooled in the fuel/oil heat exchanger
FCOM 2 7.20.12
How is the engine thrust reverser actuated?
Pneumatically from its own engine bleed source.
FCOM 2 7.20.15
What protects the thrust reversers from deploying inadvertently in flight?
Thrust reversers are protected against deploying inadvertently. If a reverser unlocks and deploys inadvertently, the reverser system applies bleed air to stow and lock the reverser.
FCOM 2 7.20.15
What is broadband vibration in the airborne vibration monitoring system, and how is it displayed?
It is vibration whose source cannot be otherwise determined, it is displayed next to the BB indication and is the average vibration detected.
FCOM 2 7.20.16
