I flew into SF ONCE - and had a go around...
Because they had no indication the nose wheel had deployed.
Flew past the tower so they could do a visual inspection.
Copilot also went down to perform a visual inspection
The good news - the nose gear was down
The bad news - there was no way to confirm it was locked.
We landed with the runway lined with emergency vehicles
And the Nose gear stayed where it belonged for a safe landing.........