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An A320 PIC experiences a possible taxiway and ramp excursion while losing sight of the yellow taxi line, leaving taxiway Q and entering into taxiway a during a night operation at bos.
| Attributes | |
| ACN | 635768 |
| Time | |
| Date | 200410 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : bos.airport |
| State Reference | MA |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 15000 flight time type : 1200 |
| ASRS Report | 635768 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | excursion : ramp ground encounters other other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Taxied off runway 33L onto taxiway Q, instructed to taxi to taxiway a to gate. Taxied on taxiway Q to taxiway a, lost sight of the yellow taxi line from taxiway Q to taxiway a, looked to my right for our gate. Saw our gate, made a right turn on taxiway a looked to acquire the yellow taxi line, saw what I thought was the yellow line, realized what I thought was the yellow taxi line was the yellow border line for the blue taxi lights, made an immediate sharp left turn. In the left turn heard a thump on the right side. Taxied to the gate, went out and inspected the right main gear and right engine, saw nothing. As we taxied out the next afternoon, I looked for the taxi yellow line from taxiway Q to taxiway a. There is not a yellow line that goes straight from taxiway Q to taxiway a. That is why I lost sight of the yellow line. It was not there.
Original NASA ASRS Text
Title: AN A320 PIC EXPERIENCES A POSSIBLE TXWY AND RAMP EXCURSION WHILE LOSING SIGHT OF THE YELLOW TAXI LINE, LEAVING TXWY Q AND ENTERING INTO TXWY A DURING A NIGHT OP AT BOS.
Narrative: TAXIED OFF RWY 33L ONTO TXWY Q, INSTRUCTED TO TAXI TO TXWY A TO GATE. TAXIED ON TXWY Q TO TXWY A, LOST SIGHT OF THE YELLOW TAXI LINE FROM TXWY Q TO TXWY A, LOOKED TO MY R FOR OUR GATE. SAW OUR GATE, MADE A R TURN ON TXWY A LOOKED TO ACQUIRE THE YELLOW TAXI LINE, SAW WHAT I THOUGHT WAS THE YELLOW LINE, REALIZED WHAT I THOUGHT WAS THE YELLOW TAXI LINE WAS THE YELLOW BORDER LINE FOR THE BLUE TAXI LIGHTS, MADE AN IMMEDIATE SHARP L TURN. IN THE L TURN HEARD A THUMP ON THE R SIDE. TAXIED TO THE GATE, WENT OUT AND INSPECTED THE R MAIN GEAR AND R ENG, SAW NOTHING. AS WE TAXIED OUT THE NEXT AFTERNOON, I LOOKED FOR THE TAXI YELLOW LINE FROM TXWY Q TO TXWY A. THERE IS NOT A YELLOW LINE THAT GOES STRAIGHT FROM TXWY Q TO TXWY A. THAT IS WHY I LOST SIGHT OF THE YELLOW LINE. IT WAS NOT THERE.
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.