Basic salary is about SGD6000, which comprises of 90% basic + 10% MVC (monthly variable component). MVC was introduced during the downturn as a result of SARS and 9/11 whereby the company has the flexibility to take it away during bad times.
You'll be paid a "13th month" pay in December.
Per diem is SGD8 an hour from reporting time in Singapore till 1/2 hour after chocks on back in Singapore.
Flying allowance is SGD36 per hour.
No transport allowance, no paxing allowance.
Realistically, you can expect to fly between 30 to 40 hours a month.
So, you would most likely take home between SGD8k - SGD10k a month.