PC12Cowboy
Berry Beery Bad
- Joined
- Nov 6, 2003
- Posts
- 561
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Didn't a witness report sparks going down the runway? Would both tires on one side have to blow to get this? Wouldn't one carry the load without dropping the wheel? Looking at the tmz pics, #5 specifically, it looks like they split the localizer (4 L and 6 R) -- if only one side failed, wouldn't it pull hard left or right (the loss of directional control)?
The anti-skid/brakes should work on either the inboards or outboards as long as one squat switch is in ground mode. Of course your sim scenario just sucks... I hope it didn't happen to these guys.
If you have an explosive tire blow.. it will most probably take out the wiring to the anti-skid... Loss of one side takes the anti-skid out completely.. if that happens and you are trying to stop the airplane the remaining tires will most certainly blow.. Here is the question? What constitutes a loss of directional control? When we blew our tire the airplane moved off to the left side of the runway.. since that wasn't what we wanted recovering seemed logical ..and since the airplane didn't respond properly and we were below v1 you abort.. without Anti-skid and all that friction you end up with blown tires on all sides not brakes and essentially no steering. you are unfortunately along for the ride at that point. I have argued with the FAA and at Recurrent about this and I still think no abort for blown tires above 80 kts on short runways especially... Problem is ( as what happened to us) you have to decide instantly and if the airplane does not seem to respond to your inputs you react.
You obviously care what I think, otherwise you wouldn't have written such a thoughtful response...
But you're right, what do I know...my wife is just a legal professional who specializes in FAA enforcement actions. I guess I foolishly let her professional experience help form my judgement on the legal differences between a recommendation and a requirement, or "should be" and "must be".
How close to max landing weight would or could they have been when landing back at TEB? any 60 drivers care to figure out the fuel required for TEB-TUL minus time in air and landing weight back at TEB? Could it have stressed the little tires?
I have flown the Lear 60 for a few years and blown tires have never been said to cause a directional control problem. I had a tire blow in a 60 on takeoff at 105-110 KIAS. We continued the takeoff with no issues or directional control problems. We also landed 2 hours later without incident.
Blown tires in the 60, or any aircraft, are known to severaly impede brake effectiveness. Other possibilities in the 60 after a blown tire are flap damage, hydraulic brake line rupture, squat switch damage (causing spoiler, T/R, and anti-skid braking problems). Any number of things could happen.
After my blown tire incident, I concluded aborting after 80 KIAS for a blown tire is a bad idea in almost every case. Everything I have read that has data on the matter would agree.