What is the recommended procedure to enter the holding pattern if instructed to hold east of the ABC VORTAC on the 090 radial?

The recommended procedure to enter the holding pattern when instructed to hold east of the ABC VORTAC on the 090 radial is to use the parallel entry method. This approach is effective for entering the hold when you are approaching from a direction that is either parallel or slightly beyond the holding course.

When entering a holding pattern using the parallel entry method, the pilot first flies a heading parallel to the inbound course (the 090 radial in this scenario), but in the opposite direction (to the west) for one minute. Following that, the pilot makes a turn to intercept the holding pattern, allowing them to align with the outbound leg before turning back onto the inbound leg toward the VORTAC. This method is particularly useful when coming from a direction that is not directly aligned with the radial, providing a smooth and efficient entry into the hold.

Other methods like direct or teardrop entries may be less efficient or applicable, especially for this specific holding instruction. Therefore, the parallel entry is the most suitable choice in this context, ensuring an effective and standardized way to enter the hold while adhering to established air traffic control procedures.