B737 Next Generation Undifferentiated
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 240; Flight Crew Type 2000
Situational Awareness
ATC Issue All Types; Aircraft Equipment Problem Less Severe; Conflict NMAC
Flight Crew Took Evasive Action
Human Factors; Aircraft; Procedure
While climbing; ATC gave traffic of a Cessna 182 at 4500 feet. He was maintaining visual separation. Climbing through 4000 feet; we acquired him on TCAS and visually. The First Officer immediately pushed over to avoid a collision. About one or two seconds before passing 300 or so feet below the 182; we received an RA. The RA was too late to be of much help in avoiding a collision. I reported the RA and the fact that the 182 was not maintaining visual to ATC.
B737 Captain reported a near mid-air collision with a light aircraft while climbing out of the DC Area.