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A canadair regional jet flight crew received a TCASII TA after accepting a climb clearance intended for another aircraft.
| Attributes | |
| ACN | 447934 |
| Time | |
| Date | 199908 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : air.vor |
| State Reference | OH |
| Altitude | msl bound lower : 27200 msl single value : 27000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : enroute altitude change cruise : descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| 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 |
| Experience | flight time last 90 days : 190 flight time total : 5700 flight time type : 3000 |
| ASRS Report | 447934 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 4000 flight time type : 200 |
| ASRS Report | 447972 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance |
| Independent Detector | aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued alert flight crew : returned to assigned altitude |
| Miss Distance | horizontal : 1500 vertical : 800 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were level at FL270. ZOB issued a climb to FL290 for apparently it was for aircraft Y. I read back the newly assigned altitude followed by our call sign, 'aircraft X.' then I initiated a 500 FPM climb to FL290. Immediately we received a TCASII TA. Within seconds, I located the traffic on TCASII and visually. I disconnected the autoplt and leveled off at 27200 ft while trying to contact ZOB. The traffic passed uneventfully at FL280. After the 3RD call, ATC responded, telling us to maintain FL270 and aircraft Y to maintain FL290. The controller then asked us if we had taken another aircraft's altitude assignment, and I told the controller that we read back 'FL290, aircraft X.' he again stated that the call was for aircraft Y. He also stated that when doing this flight in the future, we should be very cautious of the company aircraft's similar call sign. These call signs were very difficult to differentiate. Possibly, if the controller had really emphasized the 1ST number in the call signs, this situation could have been avoided. It is very important for crews to be vigilant in listening to calls from ATC, however it is just as important for ATC to listen for correct readbacks. Thanks to TCASII on this one. Supplemental information from acn 447972: I was giving an announcement to passenger and center gave us a climb from FL280 to FL290. Captain read back instruction and just started the climb.
Original NASA ASRS Text
Title: A CANADAIR REGIONAL JET FLC RECEIVED A TCASII TA AFTER ACCEPTING A CLB CLRNC INTENDED FOR ANOTHER ACFT.
Narrative: WE WERE LEVEL AT FL270. ZOB ISSUED A CLB TO FL290 FOR APPARENTLY IT WAS FOR ACFT Y. I READ BACK THE NEWLY ASSIGNED ALT FOLLOWED BY OUR CALL SIGN, 'ACFT X.' THEN I INITIATED A 500 FPM CLB TO FL290. IMMEDIATELY WE RECEIVED A TCASII TA. WITHIN SECONDS, I LOCATED THE TFC ON TCASII AND VISUALLY. I DISCONNECTED THE AUTOPLT AND LEVELED OFF AT 27200 FT WHILE TRYING TO CONTACT ZOB. THE TFC PASSED UNEVENTFULLY AT FL280. AFTER THE 3RD CALL, ATC RESPONDED, TELLING US TO MAINTAIN FL270 AND ACFT Y TO MAINTAIN FL290. THE CTLR THEN ASKED US IF WE HAD TAKEN ANOTHER ACFT'S ALT ASSIGNMENT, AND I TOLD THE CTLR THAT WE READ BACK 'FL290, ACFT X.' HE AGAIN STATED THAT THE CALL WAS FOR ACFT Y. HE ALSO STATED THAT WHEN DOING THIS FLT IN THE FUTURE, WE SHOULD BE VERY CAUTIOUS OF THE COMPANY ACFT'S SIMILAR CALL SIGN. THESE CALL SIGNS WERE VERY DIFFICULT TO DIFFERENTIATE. POSSIBLY, IF THE CTLR HAD REALLY EMPHASIZED THE 1ST NUMBER IN THE CALL SIGNS, THIS SIT COULD HAVE BEEN AVOIDED. IT IS VERY IMPORTANT FOR CREWS TO BE VIGILANT IN LISTENING TO CALLS FROM ATC, HOWEVER IT IS JUST AS IMPORTANT FOR ATC TO LISTEN FOR CORRECT READBACKS. THANKS TO TCASII ON THIS ONE. SUPPLEMENTAL INFO FROM ACN 447972: I WAS GIVING AN ANNOUNCEMENT TO PAX AND CTR GAVE US A CLB FROM FL280 TO FL290. CAPT READ BACK INSTRUCTION AND JUST STARTED THE CLB.
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.