Originally Posted by Daysleeper
I wonder if this problem goes through to the later Dash models. The Q400 checklist says if any gear indicators fail to illuminate (or come up red) then check the alternate lights. If they are all green then the gear is safe for a normal landing.
Are you sure about the bold bit? My Dash 8 300 QRH basically has three landing gear checklists. One for the alternate gear extension, one for a failure of a green down and locked light, and one for a door advisory light.
If you have a green light out and no other indications then you would use the LANDING GEAR INDICATOR MALFUNCTION checklist. But if you have other associated warnings such as the red gear unsafe light, and the light in the handle indicating gear not in the position selected, and the gear door open advisory, the only applicable checklist is the ALTERNATE LANDING GEAR EXTENSION checklist. The situation is not covered by either of the other two checklists.
Where Air Nelson differed is that they had their own QRH with an additional checklist for any gear unsafe indication. It first directs you to check the alternate indicators, and if they are green no other action is required. This is not part of Bombardier's QRH and ultimately led the crew to landing with an unsafe nose wheel.