A swing arm assembly for a utility vault housing a utility equipment includes a swing arm bracket for supporting the utility equipment and a latch support arm both rotatably coupled to a sidewall of the utility vault. A latch pin is attached to one of the swing arm bracket and the latch support arm and a locking slot is formed in the other one of the swing arm bracket and the latch support arm for slidably receiving the latch pin. The locking slot has a first locking end that locks the latch pin in a stowed position for stowing the utility equipment and a second locking end that locks the latch pin in a service position for servicing the utility equipment.