The Completely Mental Misadventures of Ed Grimley (1988)

S1E4 Ed's In Hot Water

Deidre Freebus, Ed's landlady, requests that he take care of the apartment building while she enjoys a vacation with her husband. Ed uses his handyman skills to repair the water heater but accidentally ends up getting sucked down a drain that leads to the ocean. To his surprise, he washes up on a deserted island, where he encounters a daring aviator reminiscent of Amelia Earhart.