CL65 flight crew misses crossing restriction on descent into ord citing fatigue as the problem.

Attributes
ACN	779506
Time
Date	200803
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	msl single value : 11500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : c90.tracon artcc : zzzz.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Experience	flight time last 90 days : 27 flight time total : 1450 flight time type : 1050
ASRS Report	779500
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued advisory none taken : insufficient time
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were at 16000 ft on the knox arrival into ord and were given the crossing restr for bears intersection at 11000 ft. I verified that the captain had properly entered 11000 ft into the altitude pre-select and noted that he had not immediately begun the descent; but we were also not to the point where it had become necessary. I went about doing a few other non-flying duties in preparation for arrival and thought nothing else of the restr until it was brought to our attention by the chicago controller asking if we 'had bears at 11000 ft.' I responded that we did; to indicate that was our assignment; and told the controller that we would at that time be unable to comply with the restr. The captain began the descent and crossed bears at approximately 11500 ft. He had mentioned a few times that leg how tired he was and had apparently forgotten about the crossing restr. I had done my best to monitor his flying as a result of his saying he was tired but even in my increased alertness could not watch him closely enough while doing the other descent duties to notice he had not started down. The captain proceeded to discontinue flying with a fatigue call when we reached chicago.

Original NASA ASRS Text

Title: CL65 FLT CREW MISSES CROSSING RESTRICTION ON DESCENT INTO ORD CITING FATIGUE AS THE PROBLEM.

Narrative: WE WERE AT 16000 FT ON THE KNOX ARR INTO ORD AND WERE GIVEN THE XING RESTR FOR BEARS INTXN AT 11000 FT. I VERIFIED THAT THE CAPT HAD PROPERLY ENTERED 11000 FT INTO THE ALT PRE-SELECT AND NOTED THAT HE HAD NOT IMMEDIATELY BEGUN THE DSCNT; BUT WE WERE ALSO NOT TO THE POINT WHERE IT HAD BECOME NECESSARY. I WENT ABOUT DOING A FEW OTHER NON-FLYING DUTIES IN PREPARATION FOR ARR AND THOUGHT NOTHING ELSE OF THE RESTR UNTIL IT WAS BROUGHT TO OUR ATTN BY THE CHICAGO CTLR ASKING IF WE 'HAD BEARS AT 11000 FT.' I RESPONDED THAT WE DID; TO INDICATE THAT WAS OUR ASSIGNMENT; AND TOLD THE CTLR THAT WE WOULD AT THAT TIME BE UNABLE TO COMPLY WITH THE RESTR. THE CAPT BEGAN THE DSCNT AND CROSSED BEARS AT APPROX 11500 FT. HE HAD MENTIONED A FEW TIMES THAT LEG HOW TIRED HE WAS AND HAD APPARENTLY FORGOTTEN ABOUT THE XING RESTR. I HAD DONE MY BEST TO MONITOR HIS FLYING AS A RESULT OF HIS SAYING HE WAS TIRED BUT EVEN IN MY INCREASED ALERTNESS COULD NOT WATCH HIM CLOSELY ENOUGH WHILE DOING THE OTHER DSCNT DUTIES TO NOTICE HE HAD NOT STARTED DOWN. THE CAPT PROCEEDED TO DISCONTINUE FLYING WITH A FATIGUE CALL WHEN WE REACHED CHICAGO.

Data retrieved from NASA's ASRS site as of May 2009 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.