22 MRJT En-Route

Question 1

When does the en-route phase of the flight start and end?

Answer 1

• Starts at 1500ft

- Ends at 1500ft at destination

Question 2

For a Class A AC, what are the en-route gradient margins, one engine out for:

• 2 engine
• 3 engine
• 4 engine

Answer 2

• 2 engine: 1.1%
• 3 engine: 1.4%
• 4 engine: 1.6%

Question 3

What is the minimum obstacle clearance if an AC is in an unstable condition?

Answer 3

2000ft

Question 4

What is the minimum obstacle clearance if an AC is in an stable condition?

Answer 4

1000ft

Question 5

What is the Stabilising Altitude?

Answer 5

• Stabilising altitude is the altitude, following an engine failure during the cruise, where power available again matches power required
• The AC is then able to maintain a constant altitude at a constant speed

Question 6

An AC operating under 120min ETOPS rule must be?

Answer 6

• Within 120mins of a suitable AF
• In still air
• One engine inoperative

Question 7

What is the aerodynamic ceiling?

Answer 7

• Altitude where low speed buffet and high speed buffet coincide
• Know as coffin corner

Question 8

What speeds would be used for:

• Min fuel consumption per unit of time
• Min fuel consumption per unit of distance

Answer 8

• Max endurance speed for min fuel consumption per unit of time
• Max range speed for min fuel consumption per unit of distance