This simple example illustrates a few reasons why functions are a brilliant idea, and have become fundamental building blocks in many programming languages: 1  Functions enable you to reuse parts of your program. 2  Functions make understanding the program easier because they give a name and a structure to a set of instructions.
How to keep your PPL(A) Current. Once you have obtained your JAA PPL it remains valid for five years provided that you keep your medical certificate and fly enough hours each year to keep your certificate of experience current. Your certificate of experience is part of your licence and is valid for two years.
CONS of getting a home based FFL. 1  Security â You need to only invite those you know and trust. 2  Paperwork needs to be kept for 20 years and kept well-organized. 3  Renewal is $90 every 3 years. 4  ATF does make FFL list public. 5  To make largest profits, eventually you will need to focus on a niche market or grow volume.