Which Driftdown method starts from planned cruise altitude and clears terrain by 2000 feet?

Which Driftdown method starts from planned cruise altitude and clears terrain by 2000 feet?

• A. Method 1
• B. Method 3
• C. Both Method 1 and 2
• D. Method 2

Answer: (D)

The key idea is recognizing which drift-down approach uses the cruise altitude as the starting point and maintains a 2000-foot buffer above terrain during the descent. This method plans the drift-down from the planned cruise level and ensures that, as you descend, you never let the aircraft come closer than 2000 feet to terrain. That combination—starting at cruise altitude and enforcing a 2000-foot terrain clearance—defines this particular drift-down technique, making it the correct match for the scenario. Other drift-down options involve different starting points or different terrain-clearance requirements, so they wouldn’t fit the description of starting from cruise altitude with a 2000-foot clearance.

The key idea is recognizing which drift-down approach uses the cruise altitude as the starting point and maintains a 2000-foot buffer above terrain during the descent. This method plans the drift-down from the planned cruise level and ensures that, as you descend, you never let the aircraft come closer than 2000 feet to terrain. That combination—starting at cruise altitude and enforcing a 2000-foot terrain clearance—defines this particular drift-down technique, making it the correct match for the scenario.

Other drift-down options involve different starting points or different terrain-clearance requirements, so they wouldn’t fit the description of starting from cruise altitude with a 2000-foot clearance.