Here's a nice pic of Ranger 52:
Arizona DPS Bell 407 N52AZ 'Ranger 52' | Flickr - Photo Sharing!
Unfortunately I don't know where it's based.
Ranger 41 is based at Phoenix Fire Station 41, at 2501 W Morningside Dr,
on the east side of I-17 between Bell & Union Hills.
With that logic, it seems like Ranger 52 would be at either Phoenix Fire
Station 52 or Glendale's Station 152 (formerly 52), but that doesn't seem
to be the case.
From what I can tell, DPS operates 4 Air Rescue units:
Northern (Flagstaff)
Western (Kingman)
Central (Phoenix)
Southern (Tucson)
What MIB said makes sense, I just can't confirm it.