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A-300 Tires Locking Up?  
User currently offlineJFKTOWERFAN From United States of America, joined Sep 2001, 1100 posts, RR: 15
Posted (11 years 12 months 1 day 1 hour ago) and read 1199 times:
AIRLINERS.NET CREW
DATABASE EDITOR

I was at JFK on Saturday and I watched two AA A-300's land about 15 minutes apart and just before turning onto the taxiway they both locked up the rear right outside tires. Is this a normal thing common to the A300? Just curious never actually seen tires that big lock up, it make quite a smoke show!!


C'mon Man
4 replies: All unread, jump to last
 
User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 34
Reply 1, posted (11 years 12 months 23 hours ago) and read 1160 times:

Sounds odd. In general the A300 brake/anti-skid system is reliable with minimum of problems, I can't remember changing a flat spotted A300-600 tire.

Was it a sharp right turn?



You're only as good as your last departure.
User currently offlineJFKTOWERFAN From United States of America, joined Sep 2001, 1100 posts, RR: 15
Reply 2, posted (11 years 12 months 12 hours ago) and read 1109 times:
AIRLINERS.NET CREW
DATABASE EDITOR

Yeah they were slowing up to turn off the runway. I spoke to an AA Captain he said probably they were on the brakes a little hard to make the taxiway and in making a right turn the weight transfers to the left side making it easy for the out tire(s) to lock up. Just happened to be the same aircraft type twice in a row.


C'mon Man
User currently offlineB737-112 From United States of America, joined Nov 1999, 883 posts, RR: 6
Reply 3, posted (11 years 11 months 4 weeks 1 day 10 hours ago) and read 1027 times:

FedEx does that here at BUR with their A300-600's practically every time they arrive. They generally pull off Rwy 8 before the intersection, using up something like only 4,000ft of pavement. From certain angles nearby you can hear the skidding tires over the reverse thrust and then get a nosefull of that burnt rubber smell.

User currently offlineAir2gxs From , joined Dec 1969, posts, RR:
Reply 4, posted (11 years 11 months 4 weeks 23 hours ago) and read 983 times:

I'm not sure about the A300 but I know several of the larger Boeing products have a threshold speed where the anti-skid system no longer works. It is a low speed somewhere around 10-15 knots (or maybe lower, fam schools were a long time ago). Anyway, if they were trying to make the turn they may have been below the speed and applied brakes. I really don't think the weight of the airplane would affect the actual operation of the a/s system. The system looks at wheel speed and will dump the pressure at impending lock-up whether the tire had a side-load on it (turning) or not. With a/s off or not operating due to parameter affects then a turn can cause a wheel to stop. Then again you may have seen some scrubbing, but that usually doesn't produce all that much smoke.

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