What weather conditions must be met when ferrying an air carrier airplane with one inoperative turbine engine?

When ferrying an air carrier airplane with one inoperative turbine engine, the requirement for VFR (Visual Flight Rules) conditions at both the departure and destination airports is essential for ensuring safe operations. This is primarily due to the limited performance capabilities of the aircraft when one engine is inoperative.

In VFR conditions, pilots have better visibility and can navigate visually, which is particularly important when the aircraft is operating under reduced power. The presence of VFR conditions allows for more favorable maneuverability and overall safety as the crew can maintain better situational awareness and manage the aircraft more effectively.

By contrast, IMC (Instrument Meteorological Conditions) would necessitate reliance on instruments for navigation and control, which can be challenging when operating an aircraft with reduced power output. Furthermore, if conditions are only VFR at destination or solely at one airport, it does not ensure the aircraft can safely take off or land under the operational limitations imposed by the inoperative engine.

Thus, meeting VFR conditions at both locations promotes a higher margin of safety, ensuring that the operation can proceed without the added challenges of instrument navigation and potential limitations that arise in IMC.