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ZID controller experienced operational error when descent clearance was issued to wrong aircraft with similar, same company, flight number.
| Attributes | |
| ACN | 635574 |
| Time | |
| Date | 200410 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : ape.vortac |
| State Reference | OH |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller limited radar : 15 controller non radar : 19 controller radar : 16 |
| ASRS Report | 635574 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 25200 vertical : 600 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #2 descending from FL250 to FL240. Aircraft #1 descending to FL260 20 mi away opposite direction meant to issue FL240 to aircraft #1 but inadvertently issued it to another similar call sign.
Original NASA ASRS Text
Title: ZID CTLR EXPERIENCED OPERROR WHEN DSCNT CLRNC WAS ISSUED TO WRONG ACFT WITH SIMILAR, SAME COMPANY, FLT NUMBER.
Narrative: ACFT #2 DSNDING FROM FL250 TO FL240. ACFT #1 DSNDING TO FL260 20 MI AWAY OPPOSITE DIRECTION MEANT TO ISSUE FL240 TO ACFT #1 BUT INADVERTENTLY ISSUED IT TO ANOTHER SIMILAR CALL SIGN.
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.