Time series of a sector boundary observed by PSP, with ambient solar wind conditions seen in regions 1 and 7, and the transient event (PSP_2006XO) appearing in region 4. This was classified as an ICME due to the decreasing radial speed, reduction in β, and smooth magnetic field rotation. The plasma parameters have been smoothed over 30 min. The penultimate panel shows the electron strahl PAD, normalised to its value at 90°. The electron signature, in the bottom two panels, weakens in regions 3 and 5, which could be due to scattering processes.