When taxiing onto the runway for takeoff after receiving clearance to back taxi, which direction should a pilot turn first?

When preparing to taxi onto the runway for takeoff after receiving clearance to back taxi, pilots should typically turn right first. This is primarily to ensure they align correctly with the runway direction and to avoid potential conflicts with any arriving or departing aircraft on parallel taxiways. The right turn allows for a safer maneuver, enabling the pilot to set up for takeoff while maintaining awareness of the airport traffic environment.

In the context of the other options, turning left may lead to challenges in maintaining runway orientation and could increase the risk of colliding with other aircraft or obstacles. Taking off straight ahead without a turn could also impact the ability to align properly with the runway and could be inappropriate depending on the specific circumstances of the airport layout. Thus, turning right first is the standard procedure that enhances safety during taxiing and ensures proper alignment for takeoff.