Which of the following is NOT a common error associated with the FTI Precautionary Emergency Landing (PEL) procedures?

The choice indicating that speed brake extension with insufficient energy on profile is not a common error associated with FTI Precautionary Emergency Landing (PEL) procedures is valid because it highlights a misunderstanding of the primary factors that typically lead to errors during these specific emergency procedures.

In the context of a PEL, maintaining sufficient energy refers to managing the aircraft's performance to ensure a safe glide to the landing site. While speed brakes can be an effective tool for managing descent rate, if the pilot is already in a situation where the energy state is inadequate, extending the speed brakes may not necessarily be categorized as a procedural error. Instead, it is more crucial to focus on power management, flight profile adherence, and timely configuration changes, which are critical for ensuring a successful landing under emergency conditions.

This means that the other options emphasize more direct actions that pilots must regularly monitor and adjust during PELs to maintain control and ensure safety, making them more relevant common errors. By recognizing this distinction, it's clear why the first option is not classified among these common errors.