PLEASE NOTE THAT THIS EVENT IS OVER AND DON'T EXPECT FOR ANY OF THESE FEATURES TO BE IN YOUR GAME RIGHT NOW. NO THINGS CAN BE FOUND IN THE STORE ANYMORE. Edit
The Golden Age of Aviation event lasted from mid September to mid October 2014 and was based around the "grandfathers" of planes. The currency you collected were old fashiond Pilot Helmets which could be bought for AirCash, 10 Aircash = 10 Pilot Helmets and 40 Aircash = 50 Pilot Helmets. The event lasted 30/31 days. You could buy Small Runways, medium parking spots, Medium Runways and even helipads! This made you save tons of money if you were new to the game or didn't have helicopters yet. No plane took over 20 Passengers to fly and most of them only take one passengers. These were the things you could buy:
Classic Panorama (Backdrop): 10 Pilot Helmets. "Everything was better back then? No way! This backdrop makes the good old times a thing of the future!"
Traditional Small Runway (Reskin): 25 Pilot Helmets. "Lands small planes"
Old-Fashioned Parking Spot (Reskin): 25 Pilot Helmets: "Services medium planes"
Traditional Mid-Size Runway (Reskin): 35 Pilot Helmets: "Lands medium planes"
Airport Floodlight (Decoration): 35 Pilot Helmets: -2% Serving time, Radius: 2
Mem-Aerial(Decoration): 45 Pilot Helmets: +3 Passengers, Radius: 1
Classic Helicopter Platform (Reskin): 50 Pilot Helmets: "Services all Ramacopters"
Dragonfly (Ramacopter): 50 Pilot Helmets
Albert Ross (Small Plane): 55 Pilot Helmets
MoMA - Museum of Modern Aviation: 60 Pilot Helmets: Collects 350 passengers ever 30 minutes
Dr. Decker (Small Plane): 65 Pilot Helmets
Draco (Small Plane): 70 Pilot Helmets
H20cules (Seaplane Cargo Plane): 75 Pilot Helmets
Skyfire (Small Plane): 75 Pilot Helmets
Fury (Small Plane): 80 Pilot Helmets
Mr. Smith (Small Plane): 85 Pilot Helmets
Lohengrin (Seaplane): 90 Pilot Helmets
Turbeen (Ramacopter): 100 Pilot Helmets
Raisin Bomber (Medium Plane): 110 Pilot Helmets
Aerobuss (Medium Plane): 120 Pilot Helmets