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Flight crew of S80 is issued clearance direct ord then given a crossing restr which would put them off a direct route. They attempt to descend abeam the fix but cannot descend rapidly enough.
| Attributes | |
| ACN | 387110 |
| Time | |
| Date | 199711 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | msl bound lower : 9000 msl bound upper : 10000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 387110 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
ATC facility: ZAU or chicago approach. Location: 35 DME northwest of ord. Prior to reaching krena intersection, located on the janesville arrival, and I believe prior to janesville, we were cleared direct to ord. We were next cleared to cross krena at 9000 ft. This was confusing since we had already been cleared direct to ord, so we decided to cross 35 mi northwest of ord, abeam krena, at 9000 ft. We were initially indicating over 300 KTS in the descent, and it soon became obvious that we would be unable to slow to 250 KTS by 10000 ft and still make the 9000 ft restr. We attempted to inform ATC of our inability to comply with the restr, but I do not recall ever hearing any amendment to our clearance saying it was ok if we were unable to make the restr. We crossed abeam krena at 10000 ft, still in the process of descending to 9000 ft. I do not recall us ever being questioned by ATC. I did not decide to submit a report until after discussing this flight with a friend.
Original NASA ASRS Text
Title: FLC OF S80 IS ISSUED CLRNC DIRECT ORD THEN GIVEN A XING RESTR WHICH WOULD PUT THEM OFF A DIRECT RTE. THEY ATTEMPT TO DSND ABEAM THE FIX BUT CANNOT DSND RAPIDLY ENOUGH.
Narrative: ATC FACILITY: ZAU OR CHICAGO APCH. LOCATION: 35 DME NW OF ORD. PRIOR TO REACHING KRENA INTXN, LOCATED ON THE JANESVILLE ARR, AND I BELIEVE PRIOR TO JANESVILLE, WE WERE CLRED DIRECT TO ORD. WE WERE NEXT CLRED TO CROSS KRENA AT 9000 FT. THIS WAS CONFUSING SINCE WE HAD ALREADY BEEN CLRED DIRECT TO ORD, SO WE DECIDED TO CROSS 35 MI NW OF ORD, ABEAM KRENA, AT 9000 FT. WE WERE INITIALLY INDICATING OVER 300 KTS IN THE DSCNT, AND IT SOON BECAME OBVIOUS THAT WE WOULD BE UNABLE TO SLOW TO 250 KTS BY 10000 FT AND STILL MAKE THE 9000 FT RESTR. WE ATTEMPTED TO INFORM ATC OF OUR INABILITY TO COMPLY WITH THE RESTR, BUT I DO NOT RECALL EVER HEARING ANY AMENDMENT TO OUR CLRNC SAYING IT WAS OK IF WE WERE UNABLE TO MAKE THE RESTR. WE CROSSED ABEAM KRENA AT 10000 FT, STILL IN THE PROCESS OF DSNDING TO 9000 FT. I DO NOT RECALL US EVER BEING QUESTIONED BY ATC. I DID NOT DECIDE TO SUBMIT A RPT UNTIL AFTER DISCUSSING THIS FLT WITH A FRIEND.
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.