Engines

Question 1

When doesn’t the TMC manage thrust?

Answer 1

In VNAV when its managed by a single FMC

Question 2

What is EEC soft transition/hard transition?

Answer 2

Soft = Boeing moving EEC from Norm to Alternate
Hard = You moving EEC from Norm to Alternate

Question 3

Can Boeing overboost an engine during a soft transition of the EEC?

Answer 3

No

Question 4

What occurs during OVERSPEED protection?

Answer 4

EEC removes fuel above the amber line

Question 5

For overboost protection, what is the relationship between N1 and power?

Answer 5

None.

Reduction of thrust to ensure over boost doesn’t occur

Question 6

What protections does the EEC provide?

Answer 6

N1/Thrust relationship
Atmospheric compensation
Bleed compensation
Approach Idle
Ignition when Auto ignition is selected
Auto Relight

Question 7

What are the 3 ways you can go to approach idle?

Answer 7

Flaps out of up
Continuous ignition
Nacelle anti ice selected

Question 8

What is approach idle?

Answer 8

High spool idle to ensure go around thrust within certain timeframe

Question 9

What is EEC atmospheric compensation?

Answer 9

Temperature pressure calculated by EEC for thrust as altitude changes without movement of thrust levers

Question 10

What is EEC Bleed compensation?

Answer 10

With the application of Engine Anti Ice the EEC compensates for the diversion of bleed air

Question 11

When is approach idle cancelled?

Answer 11

5 seconds after touchdown through the main gear logic

Question 12

What is the optimum duct pressure for engine start?

Answer 12

21PSI

Question 13

When are RTO Brakes armed during TO?

Answer 13

85kts