"Good To Know" Info

Question 1

What is the fuel quantity that triggers the EICAS MSG: FUEL QTY LOW?

Answer 1

FUEL QTY LOW will show when there is less than 4500 lb (2041 kg) of fuel in the left or right main fuel tank.

Ref.: FIM 28-41 TASK 856

Question 2

What is the minimum oil quantity before each flight?

Answer 2

If next Flight expected duration is 6 Hours or More or if Flight expected duration is unknown: 21.0 Quarts.

OR otherwise, a minimum of 18.0 Quarts.

Ref. B777 Daily Check

Question 3

For a Daily Check the Engineer checks the Crew Oxygen pressure before a flight. What is the minimum psi indicated on the STATUS display?

Answer 3

1500 psi at 21°C (70°F)

NOTE: At outstations, if pressure is below 1500 psi, refer to FCOM to determine that quantity is sufficient for the scheduled flight.

Ref. B777 Daily Check

Question 4

How the Ice Detector detects Ice?

Answer 4

The ice detector probe vibrates at approximately 40,000 Hz. The probe vibrates at a lower frequency when it collects ice.A heater for the probe turns on when the probe vibrates less than 39,867 Hz. The heater stays on until the probe vibration returns to its usual value or the heater operates for 25 seconds.

Question 5

How the Eng Fire Detector distinguish an Overheat from a Fire?

Answer 5

As the temperature of the core increases, electrical resistance to ground decreases. The fire detection card monitors this resistance. If the resistance decreases to the overheat set point, an overheat indication occurs in the flight deck. There is a 7.2 second time delay for the overheat indication. If the resistance decreases more to the fire set point, a fire warning occurs. When the fire or overheat condition is gone, the resistance increases to the reset point and the flight deck indications go away.

Question 6

What is the Takeoff and Landing Tire Speeds limitations?

Answer 6

Takeoff: 235 mph (204 kt)

Landing: 260 mph (226 kt)