SpeedbirdHeavy From United States of America, joined Jan 2004, 427 posts, RR: 0 Posted (11 years 1 month 5 days 9 hours ago) and read 3346 times:
After flying out of ORD many times, I've yet to do this departure again. Or even see any other aircraft do it. But, I've flown this "SID" a couple of times and they were both to LHR.
It was taking off to the East. Most aircraft go immediately out over the lake when heading to an eastern destination. However, we took off both times and turned north and followed the coastline all the way up to Kenosha/Racine and then turned east.
Cubsrule From United States of America, joined May 2004, 23831 posts, RR: 21
Reply 1, posted (11 years 1 month 5 days 9 hours ago) and read 3318 times:
This istotally a guess, but I'll share it anyway... If MDW was using 22L for arrivals, I could see ORD sending traffic north before going east (as you described) to avoid the MDW traffic. However, I'd be curious to hear a more technical explanation from someone a bit better informed than I am.
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Smcmac32msn From United States of America, joined May 2004, 2211 posts, RR: 4
Reply 2, posted (11 years 1 month 4 days 5 hours ago) and read 2859 times:
What time of day was it? Was there any type of event on the north-side of the city (eg. Cubs Game) that there would be a flight restriction for? My only other guess was that like a previous post said, MDW was using the 22's for arrivals and they needed to take you north first. (Is there still any type of flight restriction in downtown Chicago?)
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Baw2198 From United States of America, joined Dec 2003, 637 posts, RR: 4
Reply 3, posted (11 years 1 month 4 days 4 hours ago) and read 2840 times:
What airline do you fly normally? I would take a guess at BA given your username.
If its UA, You go ORD-PETTY-PECOK-ASP
If its BA, Normally you go ORD-ELX. I've seen it like the UA flight, possibly might have something to do with the arrivals from the east coast and the way they enter chicago's airspace when ORD is on an east flow.
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AAR90 From United States of America, joined Jan 2000, 3526 posts, RR: 44
Reply 4, posted (11 years 1 month 4 days ago) and read 2794 times:
Doesn't sound "strange" at all. Not common, but not unusual either. It just depends upon what route you've been assigned and how ATC is going to get you there. Happens somewhat regularly for NE bound traffic leaving ORD. Most often due to enroute weather or ATC equipment outages somewhere. You'll also see westbound traffic taking off from eastbound runways because their first fix "normally" uses those runways --happened to me last week.
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InnocuousFox From United States of America, joined Dec 2003, 2805 posts, RR: 13
Reply 5, posted (11 years 1 month 3 days 9 hours ago) and read 2699 times:
There are 4 arrival "gates" and 4 departure "gates" in Chicago Approach airspace. The arrivals are on the "corners" and the departures go out the "sides". It would largely be up to the dispatcher which route you were going to LHR. Remember, when going to LHR, you are NOT going to be flying 090 (east). You are going to be following the Great Circle route which will take you up over Canada.
The eastbound departure gate is usually quite packed with domestic aircraft going anywhere from Michigan and Ohio to the east coast and New England. In that case, it is better to get you out going over the north gate until leaving the departure space and then turning "northeast" in general.
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