JB1842
En-Route
So I've been going over the logs and old maintenance records of my new (to me) 150. So far I have found entries for a belly drain, a bracket air filter, an Airwolf Oil Seperator, and a Reiff Preheater. I have the Form 337's for the belly drain and the air filter, but nothing for the oil seperator and the preheater. Does this mean that the oil seperator and preheater don't need a 337 entry, the 337's weren't done, or they were removed? What do I look for to see if they are still installed? Any other STC/Mod's that would be beneficial? My field has MOGAS, so I'm thinking that would be the first one to get.