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Near midair collision conflict between S80 and a descending air carrier aircraft unannounced or reported by ZID controller near rod.
| Attributes | |
| ACN | 453675 |
| Time | |
| Date | 199911 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : rod.vortac |
| State Reference | OH |
| Altitude | msl single value : 25000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 453675 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| ASRS Report | 453674 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : required legal separation other spatial deviation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : exited adverse environment flight crew : took evasive action flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 7000 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
| Situations | |
| ATC Facility | staffing : zid.artcc |
Narrative:
TCASII indicated traffic alert 400 ft high 6-8 mi, followed by 100 ft, then 0 ft. ATC called for immediate descent to FL240. After descent was initiated, TCASII commanded climb. We then began a turning climb and observed aircraft near our altitude within 1-2 mi. Supplemental information from acn 453674: we observed the conflict traffic pass off our left near our altitude. We were level at FL245 at that time and once cleared by ATC, climbed back up to FL250.
Original NASA ASRS Text
Title: NMAC CONFLICT BTWN S80 AND A DSNDING ACR ACFT UNANNOUNCED OR RPTED BY ZID CTLR NEAR ROD.
Narrative: TCASII INDICATED TFC ALERT 400 FT HIGH 6-8 MI, FOLLOWED BY 100 FT, THEN 0 FT. ATC CALLED FOR IMMEDIATE DSCNT TO FL240. AFTER DSCNT WAS INITIATED, TCASII COMMANDED CLB. WE THEN BEGAN A TURNING CLB AND OBSERVED ACFT NEAR OUR ALT WITHIN 1-2 MI. SUPPLEMENTAL INFO FROM ACN 453674: WE OBSERVED THE CONFLICT TFC PASS OFF OUR L NEAR OUR ALT. WE WERE LEVEL AT FL245 AT THAT TIME AND ONCE CLRED BY ATC, CLBED BACK UP TO FL250.
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.