I don't think it's the Wilhelm Scream, because it's much longer, and kind of fades out with a growl, almost. The Wilhelm Scream is just a short "AUUUGH!" sound. I'm pretty sure it's a stock sound ...

From "A Star Is Born" to "Star Wars" to "Dial of Destiny," the Wilhelm scream keeps reminding us that movies are fun. When audiences hear the Wilhelm scream in “Dial of Destiny,” it’s sound designer ...

Ben Burtt calls it an in-joke that got out of hand. He managed to keep it on the lowdown for years. Today, though, it might affectionately be called the Once-Secret Sound Effect That Ate Hollywood.