HI Guys,

Anyone know what the oil change interval is on a turbine? I'm trying to find out numbers for a Brasilia, how many gallons per engine and how many hours between changes.

Burning or Lubricating?

On my Turbo Thrush, the airframe manufacture recommends 400 hours (PT6A-65AG). Folks at Covington Aircraft say once a year (the average ag season is less than 1000 hours).

quote:

Brasilia

not sure which engine you are running but should be one of the PW118 family, right? Usual procedure is oil change on "A" check which is 400 hours (or cycles) on this airframe IIRC. Large controversy some years back about changing the oil - period - when the Type I vs Type II oils came on line - the engines using the Type I oils were plagued with heavy oil deposits (coking) which required maintenance action; the Type I oils were on fixed drain intervals while the Type II or 'second generation' oils eliminated the need for routine or scheduled oil drain in most jet engines. We see more and more items going from a fixed interval scheule to an 'On Condition' status, especially in the larger turbine engines.
Now that I've spouted off with all this, you still don't have the maintenance schedles for the EMB at hand. I'll speak to some of my cronies and if we come up with something concrete I'll post more.

It totally depends on the manufacturer and oil type.

Type 1 50 centistroke turbine oils usually have a 400 to 800 hour change cycle on them. Theer are no cycle requirements, a cycle is 1 start and shut down with actual flight time between them. This life limit determinate usually applies to hot section components becasue of the heat cycle and it's fatigue inducing nature.

Type 2 50 centistroke turbine oils recently had the oil change time of 800 hours removed to on "on condition" change this mean that an engine in SOAP can run the same oil from overhaul to overhaul provided it does not come back with an abnormal routine sample. In reality an engine will only have oil in it from overhaul to hot section, as splitting them usually drains all the oil anyway Even the US Army anal maintainers that they are has done away with mandatory oikl change requirements for aircraft running type 2 like exxon 2380 or mil spec 23699b or later oils that have normal oil analysis reports.

So use Exxon 2380(now BP)and an oil analysis program and change it at hot or when the samples are contaminated if you are an AG operator or be FAA safe and do it when the engine Mfg. says to in ATA chapter 5 "Time limits and Maintenance checks".