 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ARTCC radar controller misspeaks with a similar call sign situation and clears the wrong aircraft to descend resulting in a loss of separation.
| Attributes | |
| ACN | 540141 |
| Time | |
| Date | 200203 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zdv.artcc |
| State Reference | CO |
| Altitude | msl bound lower : 29000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv.artcc |
| Operator | common carrier : charter |
| Make Model Name | LA-270 |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | other |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdv.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 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 13 controller time certified in position1 : 9.75 |
| ASRS Report | 540141 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | non adherence : published procedure other anomaly other |
| Independent Detector | atc equipment : conflict alert other controllera other flight crewa other flight crewb other other : 4 |
| Resolutory Action | flight crew : returned to assigned altitude flight crew : took evasive action |
| Consequence | faa : investigated |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Cleared air carrier Z to descend and maintain FL330, no response. Realized I meant to say air carrier X. Cleared air carrier X, descend and maintain FL290, had already put FL330 in data block. Conflict alert activated with air carrier Y. When air carrier X descended past FL330, asked air carrier X verify FL330. Said no, were cleared to FL290. Told air carrier X to maintain FL330. Climbed back up to FL330.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR MISSPEAKS WITH A SIMILAR CALL SIGN SIT AND CLRS THE WRONG ACFT TO DSND RESULTING IN A LOSS OF SEPARATION.
Narrative: CLRED ACR Z TO DSND AND MAINTAIN FL330, NO RESPONSE. REALIZED I MEANT TO SAY ACR X. CLRED ACR X, DSND AND MAINTAIN FL290, HAD ALREADY PUT FL330 IN DATA BLOCK. CONFLICT ALERT ACTIVATED WITH ACR Y. WHEN ACR X DSNDED PAST FL330, ASKED ACR X VERIFY FL330. SAID NO, WERE CLRED TO FL290. TOLD ACR X TO MAINTAIN FL330. CLBED BACK UP TO FL330.
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.