A319
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Total 15000
Communication Breakdown; Fatigue; Training / Qualification
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Unstabilized Approach
Flight Crew Executed Go Around / Missed Approach
Human Factors; Procedure
ATC had been vectoring our aircraft so as to fit other traffic in front of us. After we were clear for the visual approach; we were too high for safe approach in my judgment. The FO (First Officer) said; 'I am going to maneuver the aircraft' and began to S turn. I stated 'No we are not' and 'Go Around' A Soft Go Around was accomplished. The FO wanted to hack the approach by S turning from what would be a steep approach. The FO had been up for 21 hours at this point as he is a commuter who got up at 2am PDT the previous day I think the FO was tired and just wanted to put it on the ground. His subsequent landing was quite hard. I believe his judgment was affected by fatigue. Ultimately we did the right thing by going around. Unfortunately; I; as the Captain had to command it.
A319 Captain reported having to command a go around to fatigued First Officer on an unstabilized approach.