Engines

Question 1

EEC ON (in view) light means what?

Answer 1

EEC control trims the fuel flow for limiting N2 RPM when engine is about to hit a thrust mode limit

Question 2

EEC OFF (On not in view) means what?

Answer 2

Hydromechanical fuel control schedules fuel flow.

Question 3

How many EECs are there?

Answer 3

2

Question 4

What are the two modes of the EEC and their protections?

Answer 4

Normal: Protects Overboost and Overspeed Sets N1
Alternate: Protects Overspeed Only- Sets N1

Question 5

If you have to switch to alternate by checklist- HARD transition

Answer 5

I did it because of the checklist telling me to do it

Question 6

What is a Soft Transition?

Answer 6

Airplane did it-EEC went from normal to alternate automatically due to boeing logic

Question 7

IF you make hard transition from normal to alternate-

Answer 7

checklist will tell you to pull throttle back so you don’t overboost the engine because you don’t have that protection anymore

Question 8

What is Overspeed Protection?

Answer 8

RPM protection:If you lose control of the engine – will have Protection of RPM in Normal mode. The EEC will take fuel away from fuel metering unit to make sure you don’t hit 117.6 on the red tick.
Red tick  (117.5) on the N1 gauge. Max N1 RPM

Question 9

What is Overboost Protection?

Answer 9

Power Protection: Provides relationship between N1 and power

Question 10

EEC Provides Atmospheric Compensation, what does this mean?

Answer 10

• Compensates for the atmospheric conditions in change in altitude

Question 11

EEC provides Bleed Compensation what does this mean?

Answer 11

• turning on engine and wing anti ice, EEC compensates for the air being bled off engine by giving more thrust

Question 12

EEC provides Auto Relight what does this mean?

Answer 12

as my engine spools down EEC sense engine going below idle N2 rpm- provides auto relight and both ignitions come on to keep engine running. BOTH ignitions fire to keep your engine running.
More joules.

Question 13

EEC is responsible for Approach Idle what does this mean?

Answer 13

Put in higher RPM if I have to do a go around I can make the cert. limit.

Question 14

When am I in approach idle?

Answer 14

Flaps 25 or 30
Engine Nacelle Anti Ice On
Continuous Ignition Selected

Question 15

When am I in minimum idle?

Answer 15

All other phases of flight

Question 16

If the EEC controls ignition, when are we in continuous ignition?

Answer 16

CONT: Mod sev turb, Mod heavy precip, Volcanic Ash, Icing, Standing water slush- sends us into approach

Question 17

EEC controlled REV ISLN means what?

Answer 17

Theres a fault in the reversers