This guide shows the complete walkthrough of the “First to Fly” Errand in Horizon Forbidden West. You will get this errand by talking to Serivva and Kettah in Bulwark at the location marked below.
Fly to the Mountaintop
Ride Sunwing Flying Mount to the Mountaintop as shown in the picture below. You must fly to the Mountaintop. If you climb there or glide to the Mountaintop, then the quest will become bugged.
Recover Ferikka’s Armor
Ferikka’s Armor pieces will only appear if you flew to the Mountaintop on Sunwing. If you climbed to the mountaintop or glid there from another mountain, then the armor pieces won’t appear.
You can collect three Ferikka’s Armor pieces on the mountaintop from the locations marked on the pictures below. You will get the final Ferikka’s Armor piece by defeating the Stormbird that will attack you on the mountaintop.
Return to Kettah and Serivva & Repair Ferikka’s Armor
After collecting the four Ferikka’s Armor pieces, report back to Kettah and Serivva. Then go to a workbench and repair Ferikka’s Armor to complete the errand.