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Controller issued descent clearance to wrong company aircraft that had same a/north. Operational deviation.
| Attributes | |
| ACN | 122089 |
| Time | |
| Date | 198909 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : bum |
| State Reference | MO |
| Altitude | msl bound lower : 32500 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 7500 flight time type : 850 |
| ASRS Report | 122089 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation |
Narrative:
Air carrier X (ont-stl) was cruising at FL330 on J134 west of butler VOR. ZKC came on the air and said 'air carrier X is cleared to FL240 pilots discretion after FL270'. Air carrier X answered 'air carrier X is cleared to FL240, pilots discretion after FL270'. I then started a 1000 FPM descent to FL240. At 32,500' MSL descending ZKC came back on and said 'air carrier X contact kansas city center on frequency and maintain 330.' we answered 'we are descending to FL240'. ZKC 'that clearance was not for you, it was for different company X and you are 600' low, climb back to 33,000' immediately and call when level FL330'. ZKC then said 'different company X did you get your clearance to FL240'. Different company X replied 'no. You gave that clearance to air carrier X'. Upon reaching 33,000' I called ZKC and asked if I should file a report on this and that we had answered the clearance including our call sign. ZKC, 'no, you did not get into anyone else's airspace and when you answered the clearance I did not hear the company'. Further note: same company came on frequency just as ZKC was telling us we were 600' low and should climb back to 33,000'. Captain on same company also confirms descent clearance to FL240 was given to us, not different company X.
Original NASA ASRS Text
Title: CTLR ISSUED DESCENT CLRNC TO WRONG COMPANY ACFT THAT HAD SAME A/N. OPERATIONAL DEVIATION.
Narrative: ACR X (ONT-STL) WAS CRUISING AT FL330 ON J134 W OF BUTLER VOR. ZKC CAME ON THE AIR AND SAID 'ACR X IS CLRED TO FL240 PLTS DISCRETION AFTER FL270'. ACR X ANSWERED 'ACR X IS CLRED TO FL240, PLTS DISCRETION AFTER FL270'. I THEN STARTED A 1000 FPM DSCNT TO FL240. AT 32,500' MSL DESCENDING ZKC CAME BACK ON AND SAID 'ACR X CONTACT KANSAS CITY CENTER ON FREQ AND MAINTAIN 330.' WE ANSWERED 'WE ARE DESCENDING TO FL240'. ZKC 'THAT CLRNC WAS NOT FOR YOU, IT WAS FOR DIFFERENT COMPANY X AND YOU ARE 600' LOW, CLIMB BACK TO 33,000' IMMEDIATELY AND CALL WHEN LEVEL FL330'. ZKC THEN SAID 'DIFFERENT COMPANY X DID YOU GET YOUR CLRNC TO FL240'. DIFFERENT COMPANY X REPLIED 'NO. YOU GAVE THAT CLRNC TO ACR X'. UPON REACHING 33,000' I CALLED ZKC AND ASKED IF I SHOULD FILE A REPORT ON THIS AND THAT WE HAD ANSWERED THE CLRNC INCLUDING OUR CALL SIGN. ZKC, 'NO, YOU DID NOT GET INTO ANYONE ELSE'S AIRSPACE AND WHEN YOU ANSWERED THE CLRNC I DID NOT HEAR THE COMPANY'. FURTHER NOTE: SAME COMPANY CAME ON FREQ JUST AS ZKC WAS TELLING US WE WERE 600' LOW AND SHOULD CLIMB BACK TO 33,000'. CAPT ON SAME COMPANY ALSO CONFIRMS DSCNT CLRNC TO FL240 WAS GIVEN TO US, NOT DIFFERENT COMPANY X.
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.