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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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ZAU controller misses readback and descends second air carrier that conflicts with first air carrier still in holding.
| Attributes | |
| ACN | 518282 |
| Time | |
| Date | 200107 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | msl single value : 9000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : holding |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 13 |
| ASRS Report | 518282 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment : conflict alert |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 27600 vertical : 200 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Cleared first aircraft into ord and down to 9000 ft. He only read back 9000 ft, I missed rest. Then shipped first aircraft to ord, but he stayed in holding pattern as second aircraft was cleared to airport.
Original NASA ASRS Text
Title: ZAU CTLR MISSES READBACK AND DSNDS SECOND ACR THAT CONFLICTS WITH FIRST ACR STILL IN HOLDING.
Narrative: CLRED FIRST ACFT INTO ORD AND DOWN TO 9000 FT. HE ONLY READ BACK 9000 FT, I MISSED REST. THEN SHIPPED FIRST ACFT TO ORD, BUT HE STAYED IN HOLDING PATTERN AS SECOND ACFT WAS CLRED TO ARPT.
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.