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The wrong air carrier with a similar call sign as another air carrier was issued a climb clearance resulting in less than standard separation over the ocean.
| Attributes | |
| ACN | 115216 |
| Time | |
| Date | 198906 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : lax |
| State Reference | CA |
| Altitude | msl bound lower : 32500 msl bound upper : 33000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : cbk |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : pacific enroute airway : zoa |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : pacific |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : non radar |
| Qualification | controller : non radar |
| ASRS Report | 115216 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 99999 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I issued a clearance for air carrier X to climb to FL350. Air carrier xx was the aircraft that requested the altitude change who I thought I had given the clearance to. Air carrier X reached approximately FL325 before being descended. Sep was lost with another aircraft (air carrier Y) 6 mins in front at FL330.
Original NASA ASRS Text
Title: THE WRONG ACR WITH A SIMILAR CALL SIGN AS ANOTHER ACR WAS ISSUED A CLIMB CLRNC RESULTING IN LESS THAN STANDARD SEPARATION OVER THE OCEAN.
Narrative: I ISSUED A CLRNC FOR ACR X TO CLIMB TO FL350. ACR XX WAS THE ACFT THAT REQUESTED THE ALT CHANGE WHO I THOUGHT I HAD GIVEN THE CLRNC TO. ACR X REACHED APPROX FL325 BEFORE BEING DSNDED. SEP WAS LOST WITH ANOTHER ACFT (ACR Y) 6 MINS IN FRONT AT FL330.
Data retrieved from NASA's ASRS site as of August 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.