But it's not really worth being an SFI as an FO. Basically, you could do it for one year, then if you do it any longer than that, you are delaying your upgrade. They will only give you 500 hours TOTAL credit towards your upgrade after you teach for 500 hours in the sim. (Basically one for one credit until you reach 500 hours sim instruction). After you reach 500 hours sim instruction, you receive zero credit for sim instructing. Depending on how much you actually fly the line, will be detrimental to your time requirements at Emirates (3000 EK time and if you're under 55T, it's 4000 EK time).