Engine Start

Question 1

When will the FADEC abort a Start:

Answer 1

1. No light Off in approximately 10 seconds.
2. Hung Start: From the time you commanded Fuel Flow, your not at idle after 60 seconds.
3. Hot Start.

Question 2

What are the indications that the start cycle is complete?

Answer 2

Start cycle will end at approximately 55% N2 and Ignition A or B will go out.

Question 3

What is the max tailwind for engine start?

Answer 3

10 knots

Question 4

What STATUS page do you want up.

Answer 4

1. Go to Electrical and make sure you have 24 volts.
2. Go to Fuel page and make sure your fuel pump is working.
3. After 1st engine start, go to Status page and look for 2850 on your Hydraulic psi.

Question 5

Which Electrical Bus supports the engine start.

Answer 5

Central Bus.

Question 6

With a normal ground start which Battery starts the jet.

Answer 6

2 Battery.

Question 7

After Start, do you push the GPU button out before you give the signal to disconnect or vice/versa.

Answer 7

Yes, push GPU button out before you give the signal.

Question 8

What’s a good indication your going to have a HOT START.

Answer 8

If you see your ITT go past 12 o’clock, shut it down!

Question 9

You go to start 2nd engine without, why does the N2 increase to to 72% on the number one engine prior to starting number 2 engine.

Answer 9

1. Your protecting the gear box from over torquing.
   -AND-
2. Your basically doing a cross bleed start.

Question 10

1. How do we dry motor the Phenom.
2. Why should dry motor for an abnormal start, what are we doing.

Answer 10

1. Turn the ignition OFF, so your not spraying fuel.
2. It’s to get rid of HEAT and FUEL.

Question 11

If your doing a Battery start (no GPU) how long should wait to start the 2nd engine and why.

Answer 11

2 minutes, because it’s such a heavy draw on the system.

Question 12

1.Why do we want to abort the start if there’s no light off within 10 seconds.
2. What could possibly be the cause of it.

Answer 12

Because of all the fuel your dumping in and you could have a bad igniter.

Question 13

What does FADEC NOT protect.

Answer 13

1. No N1
2. Oil pressure

Question 14

SWITCH:
What takes place when you turn your Start Knob to RUN.

Answer 14

1. Turns Beacon ON.
2. Turns DC Fuel Pump on.

Question 15

How many seconds would indicate a Hung Start and what does a Hung Start mean.

Answer 15

= 60 seconds.
= You have normal light off BUT the engine isn’t spinning fast enough to reach its RPM.
Could be a bad Starter.

Question 16

During Start you don’t have N1 rotation. What could be the problem.

Answer 16

N1 probe could be iced up. Usually happens in cold weather.

Question 17

When do you not dry motor an engine after a abnormal start.

Answer 17

1. No N1
2. No Oil Pressure