Preventative Maintenance/Shower Leak
In an effort to track down a new vibration noise being transmitted from my pump through a water line, I discovered a hidden leak in the wall of my shower behind the the control valve and sprayhead/hose connection. During a shower, water was running down the inside shower wall (totally normal) and managing to get behind the trim pieces and dripping down the outside of the shower to the plywood deck (not normal). Probably no more than a 1/4 cup or so. Not enough to soak into the hallway and become visible. Possibly enough to rot the plywood with the daily showers of two full-timers. Removing the trim pieces revealed that the manufacturer had originally sealed behind them with thin foam gaskets, that after 14 years, has become brittle and crumbly. Until I can find replacement gaskets, the problem was easily solved with caulk.
I'm sure these fixtures have changed many times over the years in various Airstream models, and may or may not be a problem with other fixtures, but it's an easy thing to check by unscrewing a few screws. I know I'll be adding it to my preventative maintenance list.