The icon A5 has 6 landing challenges to be completed, 3 of which require the "Hawaiian Adventure Pack" to play.
The first 3 challenges are judged on:
Soft Landing (how slowly you touchdown- the slower you are traveling along the ground and the slower you are descending, the better)
Side Skid (how much your aircraft moves about upon landing, try to keep it as straight as possible as soon as you touch down)
Runway Centreline (how close you are to the centre of the runway and how close you are to the direction it is facing
The last 3 are all water landings and are only judged on Soft Landing and Side Skid (there is no centre line on the water). 500 points are available for each criteria. The first 3 challenges require you to score 1,450 for gold; the last 3 require 950.
For the landings, you should line up your approach from along distance away, then cut the power to idle and glide the aircraft in. Remember to put the gear down "G" on the first 3 challenges. Ideally, you should be descending at 1ft per second near the ground and traveling at less than 55kts. For the water landing, ensure you land with enough time to slow the aircraft down before you reach land. If you do not do so, it will class it as having crashed your aircraft..