Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance
Flight Crew Executed Go Around / Missed Approach; Flight Crew Took Evasive Action
Airspace Structure; Procedure
We had TCAS/RA on short final to runway 34L at approximately 800 ft AGL. We started an immediate climb per the RA and subsequently executed a missed approach. We were VFR; descending on an ILS approach with a cloud layer underneath us. The conflicting aircraft came within 400 ft according what I saw on the TCAS. I never saw the other aircraft. Approach control informed me it was a Cessna 182.
Air Carrier Captain reported an RA while on final approach to SEA.