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B737. Controller got 2 aircraft mixed up, and issued clearance for the wrong one.
| Attributes | |
| ACN | 450637 |
| Time | |
| Date | 199909 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : ctw.vor |
| State Reference | OH |
| Altitude | msl bound lower : 20000 msl bound upper : 21000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : intermediate altitude descent : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : atp pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 250 flight time total : 15000 flight time type : 7000 |
| ASRS Report | 450637 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 30000 vertical : 0 |
| Supplementary | |
| Problem Areas | FAA ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Inbound to ctw from west (destination pit), ATC assigned heading of 070 degrees for traffic. A few mins later, ATC assigned 'left turn, heading 270 degrees.' we confirmed the heading assignment, as it seemed very unusual. ATC then cleared us to descend to FL190. Passing FL200, ATC asked us to confirm altitude assignment of FL210. We replied that we were cleared to FL190, but would return to FL210. At that time, we noticed another aircraft at our altitude and a TA. Glare from sun had previously obscured our view and TCASII screen. I stopped the turn and returned to FL210. No TCASII RA, only a TA.
Original NASA ASRS Text
Title: B737. CTLR GOT 2 ACFT MIXED UP, AND ISSUED CLRNC FOR THE WRONG ONE.
Narrative: INBOUND TO CTW FROM W (DEST PIT), ATC ASSIGNED HDG OF 070 DEGS FOR TFC. A FEW MINS LATER, ATC ASSIGNED 'L TURN, HDG 270 DEGS.' WE CONFIRMED THE HDG ASSIGNMENT, AS IT SEEMED VERY UNUSUAL. ATC THEN CLRED US TO DSND TO FL190. PASSING FL200, ATC ASKED US TO CONFIRM ALT ASSIGNMENT OF FL210. WE REPLIED THAT WE WERE CLRED TO FL190, BUT WOULD RETURN TO FL210. AT THAT TIME, WE NOTICED ANOTHER ACFT AT OUR ALT AND A TA. GLARE FROM SUN HAD PREVIOUSLY OBSCURED OUR VIEW AND TCASII SCREEN. I STOPPED THE TURN AND RETURNED TO FL210. NO TCASII RA, ONLY A TA.
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.