Engine

Question 1

With standby engine indicator in AUTO, when will it turn on?

Answer 1

• AC power is lost
• Either CRT failed and STATUS selected on the ground
• EICAS failed

Display is normally blank with AC power on the airplane and EICAS operative.

Question 2

What is engine on N641GT?

Answer 2

GE CF6-80C2B6F

Question 3

When does “X-BLD” indication on N2 (secondary EICAS) display?

Answer 3

Indicates cross bleed start recommended for inflight start. The in-flight start envelope is displayed and airspeed is lower than that for a windmilling start.

Question 4

When will In-Flight start envelope display?

Answer 4

Displays for the closest starting flight level and two descending levels at 2000’ intervals when respective fire switch is IN and:

• FUEL CONTROL switch is in CUT OFF, and
• engine N2 RPM is below idle, and
• primary and secondary EICAS displayed

Question 5

What is TAI?

Answer 5

Thermal Anti-Ice: EICAS indication below N1 dial that engine anti-ice is on.

Question 6

Engine start selector - AUTO

Answer 6

From GND mode, switches to AUTO at 50% N2 RPM.

• Closes start valve and terminates ignition (“VALVE” fault light illuminates if N2 RPM exceeds 50% and starter valve open)
• Selected igniter operates continuously with LE slats, TE flaps, or engine anti-ice ON.

Question 7

Engine start selector - GND

Answer 7

Must be manually selected (push in and rotate).

• Opens start valve to supply air
• Engages air driven starter to N2 rotor
• Closes engine bleed air valve if it is open
• Magnetically held in GND nitl 50% N2 RPM

Question 8

Engine start selector - CONT

Answer 8

Selected igniter(s) operates continuously.

• No time limit
• Engine operates at minimum of approach idle

Question 9

Engine start selector - FLT

Answer 9

Both igniters operate continuously regardless of ignition selector position. No time limit.

Question 10

What is rated thrust?

Answer 10

60,200 lbs

CF6-80C2B6F

Question 11

At what speed is full takeoff thrust available?

Answer 11

~65 kts

Question 12

What is limit of assumed temperature takeoff?

Answer 12

Limited to 25% reduction in takeoff or climb thrust, whichever is greater thrust value.

Question 13

EEC Protection

Answer 13

• Provides N1 and N2 red line protection by reducing fuel flow.
• Does NOT provide EGT protection.
• Alternate Mode does NOT provide N1 or N2 protection.

Question 14

Max start EGT

Answer 14

Max start limit displayed on EGT when fuel control switch moved to CUT OFF. Remains after switch set to RUN until engine has stabilized.

Question 15

Engine start sequence

Answer 15

1. Push in and rotate start selector to GND
2. VALVE light illuminates, L or R ENG STARTER msg
3. At N2 max motoring RPM or 20% N2, position fuel control to RUN
   - Minimum N2 for selecting RUN indicated by magenta bug on N2 display
4. Fuel control to RUN opens spar and engine fuel valves and activates selected ignition
5. At approximately 50% N2, start selector automatically snaps to AUTO (audible), start valve closes, and engine stabilizes at idle

Question 16

What provides heating for fuel system?

Answer 16

Engine/oil heat exchanger

Question 17

Where is oil temperature taken from?

Answer 17

Measured after leaving the scavenge pump (post-engine), prior to entering second filter.

Question 18

How is thrust reverse actuated (CF6-80C2B6F)?

Answer 18

Pneumatic.

Electromechanical lock prevents uncommanded deployment.