Engine/Engine Start/Ignition - Question Bank

Question 1

What two engine indications are displayed full time on the EICAS?

Answer 1

N1

EGT

Question 2

State the sequence of the two events that occur when you pull a start switch with the AUTOSTART switch “ON”

Answer 2

1- Arms the start valve

2- Opens engine bleed air valve

Question 3

State the sequence of events that occur when you pull a start switch with the AUTOSTART switch “OFF”

Answer 3

1- Opens the start valve

2- Opens engine bleed air valve

Question 4

What two valves close at 50% N2 RPM during engine start?

Answer 4

1- Start valve

2- Engine bleed air valve

Question 5

What is the function of the AUTO Ignition Selector in the SINGLE position?

Answer 5

1- the EEC alternates igniter 1 and igniter 2 for each ground start

2- the EEC selects both igniters for in-flight start or flameout

Question 6

What is the function of the Standby (STBY) IGNITION selector in NORM?

Answer 6

• AC Power system supplies power to selected igniters
• Standby power system supplies power continuously to all igniters if AC power system is not powered.
• 1 or 2 - Standby power system supplies power continuously to the related igniter regardless of Auto ignition selector position or EEC

Question 7

What happens when you turn the Continuous (CON) IGNITION switch ON?

Answer 7

• Selected igniters operate continuously

- Commands approach idle minimum

Question 8

When is ignition selected for each engine individually?

Answer 8

• Manual start with related start switch out, and the fuel control switch to RUN
• Autostart, when commanded by the EEC
• Nacelle anti-ice is on
• Flameout detected

Question 9

When is the ignition selected for all engines?

Answer 9

• TE flaps are out of the up position

- Continuous ignition switch -ON

Question 10

What color does the EGT change to if the EGT start limit is exceeded?

Answer 10

Red

Question 11

What does “X-BLD” mean when displayed next to the N2 indication when an engine is shut-down?

Answer 11

Cross-bleed air is necessary for start

Question 12

How many igniters are selected for ground start, and how many for inflight start?

Answer 12

1x igniter for ground start

2x igniters for air start

Question 13

With the AUTOSTART Switch ON, describe the engine start sequence.

Answer 13

1- Start switch out arms the start valve and opens the bleed air valve
2- Fuel control switch to run initiates the start sequence
3-EEC opens the start valve and the start light illuminates
4- Predetermined N2- EEC opens the fuel metering valve and energized the selected igniter

Question 14

What three malfunctions are monitored and results in an aborted start by the EEC during ground start?

Answer 14

• Hot Start
• Hung Start
• No EGT Rise