Welcome! There are legions of Flying Cloud owners here... having had a couple of '53 FCs in my yard last summer, I can tell you that everything in them (except the
12v wiring) is bonehead simple and (relatively) easy to get to and repair or replace. They were built during a much simpler time using mostly apartment-sized appliances and standard plumbing fixtures.
There weren't any manuals for Airstreams until the early '70s.
Good luck, and be sure to post lots of photos!
Roger
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"fixin' my broken Airstreams since 1987..."
ACI 3655 AIR 2053 Current:2022 Globetrotter 27FBQ
Airstreams Emeritus: 1953 Flying Cloud, 1957 Overlander, 1961 Bambi, 1970 Safari Special, 1978 Argosy Minuet, 1985 325 Moho, 1994 Limited 34' 2 DR, 1994 B190, 2004 Interstate T1N, 2020 GT23 FBQ