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DC9 swbound climbing from FL310 to FL350 conflicted with B727 nebound level at FL330 in ZID airspace resulting in less than standard separation.
| Attributes | |
| ACN | 401244 |
| Time | |
| Date | 199804 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : rod |
| State Reference | OH |
| Altitude | msl bound lower : 33000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar oversight : supervisor |
| Qualification | controller : radar pilot : instrument |
| Experience | controller radar : 27 controller supervisory : 3 flight time total : 930 |
| ASRS Report | 401244 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 2 controller radar : 10 controller supervisory : 1 flight time total : 300 |
| ASRS Report | 400613 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : published procedure non adherence : required legal separation non adherence : clearance other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 24000 vertical : 1500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #2 nebound passing 8 mi southeast rod. Aircraft #1 swbound over rod. Aircraft #2 was level FL330. Aircraft #1 was climbing from FL310 to FL350. Controller felt the 2 aircraft would pass laterally with 5-6 mi. Conflict alert activated -- aircraft #2 was turned right to heading 090 degrees. Aircraft #1 was turned right to heading 260 degrees. Aircraft #1 was observed descending from FL326 to FL314. Aircraft #1 had a TCASII RA and followed, but did not advise ATC until well after the fact. Aircraft #1 also acknowledged an ATC clearance to turn right to heading 260 degrees but did not make turn. Separation was lost.
Original NASA ASRS Text
Title: DC9 SWBOUND CLBING FROM FL310 TO FL350 CONFLICTED WITH B727 NEBOUND LEVEL AT FL330 IN ZID AIRSPACE RESULTING IN LTSS.
Narrative: ACFT #2 NEBOUND PASSING 8 MI SE ROD. ACFT #1 SWBOUND OVER ROD. ACFT #2 WAS LEVEL FL330. ACFT #1 WAS CLBING FROM FL310 TO FL350. CTLR FELT THE 2 ACFT WOULD PASS LATERALLY WITH 5-6 MI. CONFLICT ALERT ACTIVATED -- ACFT #2 WAS TURNED R TO HDG 090 DEGS. ACFT #1 WAS TURNED R TO HDG 260 DEGS. ACFT #1 WAS OBSERVED DSNDING FROM FL326 TO FL314. ACFT #1 HAD A TCASII RA AND FOLLOWED, BUT DID NOT ADVISE ATC UNTIL WELL AFTER THE FACT. ACFT #1 ALSO ACKNOWLEDGED AN ATC CLRNC TO TURN R TO HDG 260 DEGS BUT DID NOT MAKE TURN. SEPARATION WAS LOST.
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.