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Aircraft limitations were exceeded when an air carrier flight crew landed with a miscalculated crosswind tailwind component.
| Attributes | |
| ACN | 303014 |
| Time | |
| Date | 199504 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time total : 13000 |
| ASRS Report | 303014 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : far non adherence other other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Due to thunderstorms in area, an approach to runway 26R in atl, tower announced they were going to turn airport into an east operation. Tower sent aircraft behind us around and then asked our intentions. We were configured, stabilized, and inside marker. I asked for winds. Tower called 140 degrees at 24 KTS. I glanced at my RMI compass and looked at 140 degrees. Because our crab heading was approximately 240 degrees at the moment, it appeared as though 140 degrees (the wind direction) was only 10 degrees 'behind' our left wing. I erroneously concluded that most all of the 24 KT wind was crosswind and that we, therefore, were within our 10 KT tailwind limit. I told tower we would continue and land. Landing was uneventful. I later referenced the crosswind verses tailwind chart and found that the actual tailwind was 18 KTS. My obvious error was referencing the reported winds to our heading aot to the runway heading.
Original NASA ASRS Text
Title: ACFT LIMITATIONS WERE EXCEEDED WHEN AN ACR FLC LANDED WITH A MISCALCULATED XWIND TAILWIND COMPONENT.
Narrative: DUE TO TSTMS IN AREA, AN APCH TO RWY 26R IN ATL, TWR ANNOUNCED THEY WERE GOING TO TURN ARPT INTO AN E OP. TWR SENT ACFT BEHIND US AROUND AND THEN ASKED OUR INTENTIONS. WE WERE CONFIGURED, STABILIZED, AND INSIDE MARKER. I ASKED FOR WINDS. TWR CALLED 140 DEGS AT 24 KTS. I GLANCED AT MY RMI COMPASS AND LOOKED AT 140 DEGS. BECAUSE OUR CRAB HDG WAS APPROX 240 DEGS AT THE MOMENT, IT APPEARED AS THOUGH 140 DEGS (THE WIND DIRECTION) WAS ONLY 10 DEGS 'BEHIND' OUR L WING. I ERRONEOUSLY CONCLUDED THAT MOST ALL OF THE 24 KT WIND WAS XWIND AND THAT WE, THEREFORE, WERE WITHIN OUR 10 KT TAILWIND LIMIT. I TOLD TWR WE WOULD CONTINUE AND LAND. LNDG WAS UNEVENTFUL. I LATER REFED THE XWIND VERSES TAILWIND CHART AND FOUND THAT THE ACTUAL TAILWIND WAS 18 KTS. MY OBVIOUS ERROR WAS REFING THE RPTED WINDS TO OUR HDG AOT TO THE RWY HDG.
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.