http://avherald.com/h?article=50edd980&opt=0A Southwest Airlines Boeing 737-700, registration N925WN performing flight WN-1551 from Atlanta,GA to Washington National,DC (USA), was descending towards Washington when the crew decided to divert to Baltimore reporting a hydraulic fault. The aircraft landed safely on Baltimore's runway 33L, attending emergency services reported a lot of smoke emanating from the brakes of the aircraft.
A replacement Boeing 737-700 registration N237WN "hopped" to Washington National reaching a maximum altitude of 4000 feet and continued the next sectors of flight WN-1551.
https://www.flightaware.com/live/flight/SWA1551/history/20230925/1245Z/KATL/KDCA
