Narrative:

I was notified that ATC had indicated a possible pilot deviation. We were delayed departing lax for flow control into ord. We blocked out of lax 1 hour 5 mins late. I was advised that at approximately 14 NM northwest of ord, we slowed too rapidly causing a loss of separation between us and another air carrier flight. I do not remember anything out of the normal for this approach and landing. From what I remember, this was an autoland approach to runway 14R. There was some WX, but it was not too bad. The autoland approach was for currency of the aircraft. We did ask approach control about protecting the approach. He told us to ask tower. When we contacted tower, he said that he couldn't guarantee protection, but would keep us advised. From TCASII, there appeared to be normal spacing between us and the aircraft in front of us. The controllers seemed to be very busy, but then they usually are. Everything about this approach and landing was normal. We followed all clrncs and I do not remember anything other than normal instructions and comments by all of the controllers.

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Original NASA ASRS Text

Title: B757-200 FO RESPONDS TO QUESTION FROM COMPANY ABOUT FLT ACTIVITY INTO ORD AND A POSSIBLE LOSS OF SEPARATION WITH ANOTHER ACFT.

Narrative: I WAS NOTIFIED THAT ATC HAD INDICATED A POSSIBLE PLTDEV. WE WERE DELAYED DEPARTING LAX FOR FLOW CTL INTO ORD. WE BLOCKED OUT OF LAX 1 HR 5 MINS LATE. I WAS ADVISED THAT AT APPROX 14 NM NW OF ORD, WE SLOWED TOO RAPIDLY CAUSING A LOSS OF SEPARATION BTWN US AND ANOTHER ACR FLT. I DO NOT REMEMBER ANYTHING OUT OF THE NORMAL FOR THIS APCH AND LNDG. FROM WHAT I REMEMBER, THIS WAS AN AUTOLAND APCH TO RWY 14R. THERE WAS SOME WX, BUT IT WAS NOT TOO BAD. THE AUTOLAND APCH WAS FOR CURRENCY OF THE ACFT. WE DID ASK APCH CTL ABOUT PROTECTING THE APCH. HE TOLD US TO ASK TWR. WHEN WE CONTACTED TWR, HE SAID THAT HE COULDN'T GUARANTEE PROTECTION, BUT WOULD KEEP US ADVISED. FROM TCASII, THERE APPEARED TO BE NORMAL SPACING BTWN US AND THE ACFT IN FRONT OF US. THE CTLRS SEEMED TO BE VERY BUSY, BUT THEN THEY USUALLY ARE. EVERYTHING ABOUT THIS APCH AND LNDG WAS NORMAL. WE FOLLOWED ALL CLRNCS AND I DO NOT REMEMBER ANYTHING OTHER THAN NORMAL INSTRUCTIONS AND COMMENTS BY ALL OF THE CTLRS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.