I don't know what the tax rules are in the RSA, but in the Uk you cannot claim for expenses that put you in a position to do a job. The training bond is not an expense, it is a forfeiture that you agreed to for breach of contract, it is not a working expense.
If you pay for a conversion to another type in order to place you in a position to work for an employer that would not be allowed either. If the company had already employed you and then required you to change types at your own expense that might be allowed, but it would be very unusual. If a company sold you a type rating and then employed you on the basis of having that rating, you could not claim this as an expense for the reason that the rating simply put you in a position to be employed.
As I say, I do not know what the rules are in the RSA, but I would be very surprised if they were so generous.