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Deviation from clearance - air carrier taxies onto the wrong taxiway. It was dark, their vision was impaired and they used the wrong chart.
| Attributes | |
| ACN | 301772 |
| Time | |
| Date | 199504 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : den |
| State Reference | CO |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 8000 flight time type : 1500 |
| ASRS Report | 301772 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After deicing, den ground control cleared us to taxi to runway 25 via taxiway golf. Using the 20-7B chart issued by a commercial company for our airline I initiated taxi to golf taxiway via the shortest route from deice spot 8, around the north end of the grass island off my nose. Turning on to what I thought was taxiway golf it became obvious that we had entered taxiway foxtrot. We confirmed our taxi clrncs, confessed our situation and transited to taxiway golf at the next intersection. A review of the charts leads me to believe that the 20-7B chart is not accurate in depicting taxiway golf's location. Also it was very dark the aircraft has deice fluid covering the windows and outside visibility was poor. The airport chart is accurate, but it was on my side clipboard and my 20-7B chart was on the chart holder, well lit up, and that is what I chose to initiate my taxi. We were also 10 hours into a 13 hour duty day. We were both a little fatigued and probably not at our sharpest.
Original NASA ASRS Text
Title: DEV FROM CLRNC - ACR TAXIES ONTO THE WRONG TXWY. IT WAS DARK, THEIR VISION WAS IMPAIRED AND THEY USED THE WRONG CHART.
Narrative: AFTER DEICING, DEN GND CTL CLRED US TO TAXI TO RWY 25 VIA TXWY GOLF. USING THE 20-7B CHART ISSUED BY A COMMERCIAL COMPANY FOR OUR AIRLINE I INITIATED TAXI TO GOLF TXWY VIA THE SHORTEST RTE FROM DEICE SPOT 8, AROUND THE N END OF THE GRASS ISLAND OFF MY NOSE. TURNING ON TO WHAT I THOUGHT WAS TXWY GOLF IT BECAME OBVIOUS THAT WE HAD ENTERED TXWY FOXTROT. WE CONFIRMED OUR TAXI CLRNCS, CONFESSED OUR SIT AND TRANSITED TO TXWY GOLF AT THE NEXT INTXN. A REVIEW OF THE CHARTS LEADS ME TO BELIEVE THAT THE 20-7B CHART IS NOT ACCURATE IN DEPICTING TXWY GOLF'S LOCATION. ALSO IT WAS VERY DARK THE ACFT HAS DEICE FLUID COVERING THE WINDOWS AND OUTSIDE VISIBILITY WAS POOR. THE ARPT CHART IS ACCURATE, BUT IT WAS ON MY SIDE CLIPBOARD AND MY 20-7B CHART WAS ON THE CHART HOLDER, WELL LIT UP, AND THAT IS WHAT I CHOSE TO INITIATE MY TAXI. WE WERE ALSO 10 HRS INTO A 13 HR DUTY DAY. WE WERE BOTH A LITTLE FATIGUED AND PROBABLY NOT AT OUR SHARPEST.
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.