POWERPLANT Flashcards
- What does an illuminated ENGINE CONTROL light mean?
Engine control system is not dispatchable due to a fault
- Should you takeoff with an ENGINE CONTROL light illuminated?
No
- Will you see an ENGINE CONTROL light in
flight?
No, ground only light
- Each EEC has how many independent
channels (computers)?
Two
- If an EEC channel fails, how do you select an
operating channel?
You don’t, EEC channel switching is automatic
- What will the EEC do for you if you shove the throttle to the forward stop (firewall)?
The EEC will provide N1 and N2 redline overspeed protection (not EGT)
- What engine protection will the EEC give you?
N1 & N2 redline overspeed protection
- The EEC has how many control modes?
Two
- What are these modes? (EEC Control Modes)
Normal
Alternate
- The EEC has how many alternate modes?
Two
- What are the EEC alternate modes?
Soft
Hard
- How does the EEC operate in the soft ALTN
mode?
EEC uses the last valid flight conditions to define engine parameters: Limits may change if conditions do
- What do the switches and lights look like in the soft ALTN mode?
ON light and amber ALTN light
- How does the EEC operate in the hard ALTN
mode?
ALTN thrust schedule, factory pre- programmed hard data
- What do the switches and lights look like in the hard ALTN mode?
ALTN light only (pushbutton)
ON light and ALTN light (pull throttle to idle)
- Will you get full rated power in the hard alternate mode?
Hard alternate mode thrust is always equal to or greater than normal mode thrust for the same lever position
- Does the EEC provide N1 and/or N2 redline overspeed protection?
Yes
- Does the EEC provide EGT redline
exceedence protection?
No (except on ground starts only)
- What are the IDLE phases the EEC can select?
Ground min.
Flight min.
Approach
- When is APPROACH idle automatically selected?
Flaps in LDG CONFIG or ENG ANTI-ICE ON
- In flight, if a fault prevents the EEC from receiving flap or anti-ice signals, when is APPROACH idle selected?
Below 15000feet MSL
- What does an illuminated amber REVERSER
light mean?
Fault in the reverser system
- What are four things that can cause the
REVERSER light to illuminate?
Auto restow system active
Translating sleeve not in commanded position
Isolation valve not in the commanded position
Synchronization shaft lock circuitry problem
- When do the REVERSER lights come on in normal operation?
When stowing the reversers
- For how long do the REVERSER lights
illuminate?
When stowing the reversers.10 seconds
- When will you get a MC light & ENG
annunciator in the case of REVERSER light illuminated?
When reverser light stays on past 12 seconds
- What is the function of the engine start switches GRD position on the ground?
Open start valve
Closes bleed valve
Arms ignition
- How does ignition operate in CONT?
Selected igniter operates engine running
- How does ignition operate in FLT?
Both igniters operate if engine failure is sensed with start lever in idle
- What is the power source for the LEFT igniters?
associated AC transfer bus
- What is the power source for the RIGHT
igniters?
Standby AC
- When must the engine start switches (with the
OFF option) be in CONT?
takeoff, landing, heavy precip, anti-ice in use
- What is the difference between the OFF option and the AUTO option on the start switches?
With…
eng is running
flaps down below 18,000 ft
or engine anti-ice is on
you get ignition from the selected igniters
- How many autothrottle actuators are there?
One servo motor for each throttle
- What has to happen before reverse thrust can be selected?
Throttles must be at idle position
- Can the throttles be advanced while in reverse
thrust?
No
