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Flight crew of a B737-200 started an expedited descent given by controller and then climbed back after 300 ft descent in response to a TCASII RA. Flight crew heard their call sign and acknowledged, but ARTCC radar controller was very busy due to bad WX.
| Attributes | |
| ACN | 416589 |
| Time | |
| Date | 199810 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | msl bound lower : 21700 msl bound upper : 22000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Flight Phase | descent other |
| Route In Use | arrival other enroute : on vectors enroute airway : zau |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 11000 flight time type : 2000 |
| ASRS Report | 416589 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 9000 vertical : 800 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
We were at FL220 approaching ord. We were given descent clearance to 11000 ft and expedite. After descending only 300 ft, we received a TCASII RA and initiated climb back to FL220. WX at ord had caused a major disruption at ord and it appeared the ZAU controller was saturated. It may be possible that the clearance to descend given to us was intended for another aircraft, but it was clear that our call sign was used for the clearance.
Original NASA ASRS Text
Title: FLC OF A B737-200 STARTED AN EXPEDITED DSCNT GIVEN BY CTLR AND THEN CLBED BACK AFTER 300 FT DSCNT IN RESPONSE TO A TCASII RA. FLC HEARD THEIR CALL SIGN AND ACKNOWLEDGED, BUT ARTCC RADAR CTLR WAS VERY BUSY DUE TO BAD WX.
Narrative: WE WERE AT FL220 APCHING ORD. WE WERE GIVEN DSCNT CLRNC TO 11000 FT AND EXPEDITE. AFTER DSNDING ONLY 300 FT, WE RECEIVED A TCASII RA AND INITIATED CLB BACK TO FL220. WX AT ORD HAD CAUSED A MAJOR DISRUPTION AT ORD AND IT APPEARED THE ZAU CTLR WAS SATURATED. IT MAY BE POSSIBLE THAT THE CLRNC TO DSND GIVEN TO US WAS INTENDED FOR ANOTHER ACFT, BUT IT WAS CLR THAT OUR CALL SIGN WAS USED FOR THE CLRNC.
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.