Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Distraction; Situational Awareness
Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Flight Crew Returned To Clearance
Human Factors; Environment - Non Weather Related; Airport; Airspace Structure
ZZZ1 to ZZZ as we approached ZZZ at 5;000 feet we got vectors for the visual approach XXR far out over the mountains shortly after we got cleared for the approach. My FO (First Officer) called for 3;500 feet set in the altitude selector. After setting 3;500 feet my FO started a descent from 5;000 feet and with only flaps 9 selected and a descent over the mountains and the RA hit 1;500 feet triggering a 'Terrain; Terrain; Pull up' Call out over the audio system.Cause - Distraction amongst pilots and Air Traffic Control juggling multiple frequencies and low altitude.Suggestion - Better situational awareness and speaking up.
EMB-145 Captain reported receiving a terrain warning on final approach.