What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
At pdx, the flight crew for Alaska flight 1291 taxied from the terminal to runway 28L for takeoff. As the captain made a turn, he misjudged the taxiway, edge, and markings. The aircraft rolled over taxiway edge lights between B3 and B4 and between tango and bravo. Two taxiway lights were damaged and the aircraft sustained damage to the left inboard main landing gear tire (tire #2). The captain obtained assistance to return the aircraft to the taxiway. He then taxied the aircraft back to the gate for maintenance inspection and repair.
The flight crew reported the weather conditions were clear and dry. It was nightime. The captain stated he misjudged the turn. Night operations and taxiway sign placement were factors (the taxiway sign is placed after the taxiway). The first officer stated that he had an expectation bias about the taxiway layout. The fo also stated he experienced a moment of hesitation, and he should have spoke up at first uncertainty.
The root cause analysis category is information processing. The subcategory is perception.
To mitigate the risk of a future event, the captain states he will do a more thorough review of each airport taxiway layout and routing. The first officer stated he would voice concerns at the first moment of uncertainty.
The flight crew asap'd this event. The asap erc accepted the flight crew reports and has subsequently closed the event.
Activity: NM02202502164
As the FAA filed it
AT PDX, THE FLIGHT CREW FOR ALASKA FLIGHT 1291 TAXIED FROM THE TERMINAL TO RUNWAY 28L FOR TAKEOFF. AS THE CAPTAIN MADE A TURN, HE MISJUDGED THE TAXIWAY, EDGE, AND MARKINGS. THE AIRCRAFT ROLLED OVER TAXIWAY EDGE LIGHTS BETWEEN B3 AND B4 AND BETWEEN TANGO AND BRAVO. TWO TAXIWAY LIGHTS WERE DAMAGED AND THE AIRCRAFT SUSTAINED DAMAGE TO THE LEFT INBOARD MAIN LANDING GEAR TIRE (TIRE #2). THE CAPTAIN OBTAINED ASSISTANCE TO RETURN THE AIRCRAFT TO THE TAXIWAY. HE THEN TAXIED THE AIRCRAFT BACK TO THE GATE FOR MAINTENANCE INSPECTION AND REPAIR.
THE FLIGHT CREW REPORTED THE WEATHER CONDITIONS WERE CLEAR AND DRY. IT WAS NIGHTIME. THE CAPTAIN STATED HE MISJUDGED THE TURN. NIGHT OPERATIONS AND TAXIWAY SIGN PLACEMENT WERE FACTORS (THE TAXIWAY SIGN IS PLACED AFTER THE TAXIWAY). THE FIRST OFFICER STATED THAT HE HAD AN EXPECTATION BIAS ABOUT THE TAXIWAY LAYOUT. THE FO ALSO STATED HE EXPERIENCED A MOMENT OF HESITATION, AND HE SHOULD HAVE SPOKE UP AT FIRST UNCERTAINTY.
THE ROOT CAUSE ANALYSIS CATEGORY IS INFORMATION PROCESSING. THE SUBCATEGORY IS PERCEPTION.
TO MITIGATE THE RISK OF A FUTURE EVENT, THE CAPTAIN STATES HE WILL DO A MORE THOROUGH REVIEW OF EACH AIRPORT TAXIWAY LAYOUT AND ROUTING. THE FIRST OFFICER STATED HE WOULD VOICE CONCERNS AT THE FIRST MOMENT OF UNCERTAINTY.
THE FLIGHT CREW ASAP'D THIS EVENT. THE ASAP ERC ACCEPTED THE FLIGHT CREW REPORTS AND HAS SUBSEQUENTLY CLOSED THE EVENT.
ACTIVITY: NM02202502164