A Delta Airlines employee used a "Peppa Pig" iPad that a kid lost on a plane to record videos pleasuring himself ... at least according to a new lawsuit.

Officers "stormed the cockpit" of a Delta flight after it landed in San Francisco, according to one passenger on board.

"Delta will fully cooperate with authorities as the circumstances around this flight are investigated," a Delta spokesperson said.

“Delta’s current and planned individualized pricing practices not only present data privacy concerns, but will also likely mean fare price increases up to each individual consumer’s personal ‘pain point’ at a time when American families are already struggling with rising costs,” a group of U.S. Senators wrote.