Chinaclipper

3 clues
1936 Bogart film
Seaplane that made its first transpacific flight in 1935
Pan Am plane that made the first trans-Pacific airmail flight
Similar answers:
Albertaclipper
Balletslipper
Balletslippers
Bathroomslipper
Bedroomslippers
Bigclipper
Bunnyslippers
Burgerflipper
Chinacabinet
Chinacabinetcontents
Chinachain
Chinaclay
Chinaclipper
Chinacloset
Chinacup
Clipper
Clippers
Clippership
Coclipper
Coinflipper