is one piece episode 989 filler?

Big Mom recognizes Chopper as a Straw Hat and chases his tank into a canyon, with her forces setting up cannons and mortars to fire at the tank. Although Chopper fires back and destroys the cannons and mortars, Big Mom throws a missile at the tank from above.

The tank is unharmed but it is sent flying into the air. Chopper uses the chance to fire at Big Mom's head, then throws another explosive into Big Mom's mouth.

Big Mom is still unharmed and chases the tank away. Kanjuro comes to Orochi with an unconscious, beaten Momonosuke.