ATR electric systems - an introduction

Picked one by one from a mixed channel. Transcript check: both title readers certain; channel sample of 8 certain picks all confirmed by transcript. Channel rule: Include only descriptively titled teaching videos: ATR systems/PFD tutorials, procedure and performance explainers (SOP, take-off performance, RNP AR, licences, aircraft explained), report-based accident analyses with non-hook titles, and aircraft walkarounds/museum tours. Exclude news, travel/airshow reports, humor clips, updates, and any title using hype or withheld-information hooks.