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Hang on, one of our wheels is missing! Horror on take-off as passengers see landing gear fall off plane.
...faster than you can say Bombardier Q-series! (www.dailymail.co.uk) More...Sort type: [Top] [Newest]
"Ya picked a fine time to leave me loose wheel...." (with apologies to Kenny Rogers)
Glad they got her down safe.
Glad they got her down safe.
4 hungry children and a crop in the field...
Are the brakes hydraulically or electrically activated? When the wheel tore loose would it damage the braking for the remaining wheel or should that remain completely functional? I believe the story states the plane swung to the right on landing but having burned off fuel, the remaining right main tire should not have been overloaded but it would have only had braking for 1 wheel instead of braking for 2 wheels like the left side. I am just assuming that designs take into account these oh, crap! moments and unless the wheel falling off bounced and damaged something, it should be a return to the terminal, pick up a rental plane (kidding), and continue on your way.
The Q400 seems to be lacking here. Were most airplanes have two hydraulic systems where one powers the inboards and the other powers the outboards, the Q400 has common hydraulic lines with a shuttle valve that gets pressure from the primary source or secondary source. The primary source is the #1 hydraulic system that uses line pressure with antiskid from the foot pedals. The secondary source is the #2 system with a dedicated accumulator that is activated by a single lever that applies pressure to all wheels with no antiskid protection. The rub is I am not sure how it would react to ruptured brake line as it would then be hard to build pressure. In this scenario the toe brakes would be functional and the Left Main would brake as normal but the Right Main may not as the pressure is leaked out the damaged inboard line.
Also the storied said it veered left. This would support the normal braking on the left and reduced braking on the right it both toe brakes were activated with the same pressure. Also the right wheel might tend to skid more and the anti-skid could reduce braking further.
Should be hydraulic

Dash-8's are statistically one of the safest aircraft in service. I would rather fly in one of them than most of the current crop of RJ's. I have never been in a Dash 8 where we didn't eventually take off. I have had way too many flights canceled in RJ's, due to "mechanical" issues.