While playing Mercy in competitive play, I noticed that I could view the health my allied Junkrat's RIP-Tire. I was even shown a critical health indicator when the Tire had nearly been destroyed.
This made me wonder whether it was possible to heal an allied Junkrat's RIP-Tire, similar to D.Va's mech during a self-destruct.
I know that a RIP-Tire can be healed using health packs, but I'm not sure whether or not it can be healed by support heroes like Ana or Lucio.