Flight Module

The Skell Flight Module is a device in Xenoblade Chronicles X that allows human-made Skells to fly in the air. Originally called the Integrated Flight-Capable Skell System (IFCSS), its name was shortened due to a command from Commander, who financed the project.

Plot
Before the Flight Module, Skells were only capable of flight in space. They used their spaceflight capabilities to fend off the Ghosts and the Samaar Federation while leaving Earth, but their flight abilities were only strong enough to allow them to jump while under the influence of gravity, due to the lack of energy to provide the lift.

Lin Lee Koo, a mechanic from New Los Angeles, spent most of her time working on a module that would allow Skells to fly as part of her dream to bring results from her parents' Skell research. During the events of, she had Doug test a flight module, but it crashed due to a reversed bypass causing exhaust to enter the Skell's cockpit. Other tests involved engine explosions, large amounts of fire damage, and Skells themselves going berserk and crashing into the sea.

During the events of A Girl's Wings, Lin gets the help of Sakuraba Industries and Candid & Credible to develop a Skell with the ability to fly. Cross helped collect the necessary materials to fix her final Flight Module, and performed the first test flight by flying the flight-capable AS0115 Formula XT up to plant a Data Probe at FN Site 110 on top of Talon Rock Summit in Primordia.

Obtaining
The Flight Module will be available for all Skells once the player completes the Affinity Mission A Girl's Wings, which can be taken after finishing.

Gameplay
The Flight Module enables access to all parts of the world of Mira that were previously inaccessible, including the mountains of Primordia, the Divine Roost at the top of Noctilum, the island in the middle of the Yawning Giant in Oblivia, and more.

There are also a few NPCs that only appear at the top of large structures like BLADE Tower, so flight is required to access them. Additionally, flight is required to start.

Skells need fuel in order to fly, although the player is unlikely to run out of fuel by simply flying, so travel is essentially free. When the Left Stick is pressed, the Skell can speed up to move faster, although it will need to brake itself to stop. Additionally, the player can press ZL + ZR at the same time to freefall like a skydiver to the ground without consuming fuel.

While flying, the song Don't worry plays, although it is overriden by the cave music z?2f0i1e2l0d914, Ganglion music like z12e201v2e091n4t (both parts), and the Divine Roost track z15f20i12e09l14d.

Combat
Skells are able to use their flight abilities in combat. This allows them to do attacks from above and below the enemy. Attacking from above grants the chance to use the Higher Ground Soul Voice, and augments like PositionDmg.ABOVE increase the damage whenever the player is above the enemy.

However, a few enemies do have attacks that do extra dangerous effects to flying Skells. For example, the Vigent's Rock Missile can flying Skells, causing them to fall all the way down to the ground.