Note : Only Franklin can start this quest though Michael and Trevor can help collect the parts. Go to east Sandy Shores and follow the (?) to Omega the crazed hippy. There are 50 parts to collect in all.
As you get closer to a part, you will hear a humming noise. They don’t have to be collected in order either. If you have the Chop App, he can help you find collectibles like spaceship parts or letter scraps. He will only run off to find a collectible if he is close enough and he will bark more as he gets nearer to it.
Alamo Sea, Sandy Shores Bay
This part is underwater and right in the middle of the Sandy Shore bay in front of The Boat House restaurant.
Grapeseed, Cow Farm
Trevor often finds himself here. It is lying on the ground.
Mount Chiliad, Cannabis Farm
You find this part inside the barn where a workshop and a man are.
Paleto Bay, Donkey Punch Family Farm
You will find it on the ground inside the barn with cows in it. The location is nearer to Paleto Bay but is still just part of Mount Chiliad.
Paleto Bay, Fire Training Building
This one is on the 3rd floor of the building.
Paleto Forest, Highway 1
You can find this part near a pipe on the edge of Paleto Forest.
Paleto Beach, Island Landmass
Under the trees on this island.
Cassidy Creek, Calafia Bridge
There are a lot of rocks around the part and it is just under the very large Calafia Bridge.
Cassidy Creek, Great Ocean Highway
This one is in an unreachable place on foot so you must either parachute in or land the helicopter on the edge of the buttress the part is on. Be very careful as you approach.
Mount Josiah, Rock Face
This one is quite hard to find. It rests on a ledge among a large rock face. You can parachute onto it for an easy way to reach it.
Zancudo River, Near Alamo Sea
You will find it on the north side of the river close to a railroad bridge.
Zancudo River, Near Great Chaparral
You will find this piece underneath an old wooden bridge that crosses the Zancudo River. It is on the east side near a support column.
Tongva Valley, Zancudo Barranca
There is a shallow pool of water below a waterfall. Dive in there to find the spaceship part.
Tongva Hills, Marlowe Vineyard
You can find this part in the fourth row from the top of the vineyard.
Tongva Hills Cave
You can reach this cave by a decent off-road vehicle or by parachuting in. The part is inside the cave and can be hard to find.
This part is in the backyard of a house where a telescope pad is.
Richman Glen, Harlow Drive
Look beside the tree near the ornamental pool. This location is a drug recovery centre and has tennis courts so look out for those.
Rockford Hills, Los Santos Golf Club
It can be found on a little island in the middle of the water on the course.
Burton, Carcer Way
You will need a helicopter so you can land on top of the hotel to find the part. It is in the middle of the empty pool there
Burton, Las Lagunas Boulevard
There is also a Stunt Jump near this part. It is behind a bush on the Rockford Plaza Island. You will need to go through the left tunnel.