Citation 525 pilots help!

[Dugie8]

Freezing points:

Jet A -40C
Jet A with Prist -40C
Jet A1 -47C

So as we see here, Prist does NOT lower the freezing point like many people seem to believe. I fly a particular plane that you will get the fuel filter light when close to them temps, (Prist or no Prist). Some pilots incorrectly think their fuel temp limit raises to JetA1 limits when they request Prist.

You are 1000% correct. It's the water in the fuel PRIST is meant to "depress" the freezing point of.

Very good catch!

 

[Beep]

If your friends boss had any balls, he'd ask to see the maintenance write up after the guy had a mechanic investigate the issue.

Exactly! Does your cousin know if be asked for a partial refund on the fuel by claiming he didn't get prist? It is entirely possible that they may be dealing with someone that is playing an underhanded trick to negotiate after the fact.