You almost make it sound like an company worth working for Krusty. How many days off a month & how many hours a year are crew working for for this 42k?
Based on the EBA the minimum days off in a 28 day cycle is 8 guaranteed with at least one weekend.
The minimum base salary is $46K per year for a year 1 FO and if you were to work max hours you would make an additional $12k in DTA and $700 in leave loading making your actual gross at $58K. With call outs and extensions you could make over $60k.
A lot of the DTA is tax free and does not show on the group certificate.
Whether this is a good wage is up to the individual but don't quote the $42k rubbish as its very wrong.