Narrative:

While taxiing to our ramp area, the captain lost awareness of his location on the field. I tried to make him aware of the situation with verbal instructions, but only after placing my hand on the power levers over his hand did he seem to 'snap' out of his state of mind. Once the aircraft had stopped, our position was nosewheel across the hold short line of a runway. There was conflicting traffic on the runway or on approach. The captain decided to turn off on the next taxiway without letting me notify ground control first. After I objected to this action, ground spoke with us and noticed that we had missed our taxiway turn. Ground informed us to proceed with our taxi. We apologized for the action and the controller informed us that it was no problem. Due to the multiple times in a trip sequence that we service a particular airport, an attitude of complacency affects human performance. Diligence while operating an aircraft is foremost the priority of everyone in the air traffic control system. If a person feels preoccupied with extraneous factors, they should relieve themselves from the operations system. All efforts should be focused on safe, professional operations while in the air traffic system.

Google
 

Original NASA ASRS Text

Title: FLC OF DASH8 STOPS TAXI WITH NOSEWHEEL ACROSS THE HOLD SHORT LINE. GND CTLR ISSUES CONTINUED TAXI INSTRUCTIONS.

Narrative: WHILE TAXIING TO OUR RAMP AREA, THE CAPT LOST AWARENESS OF HIS LOCATION ON THE FIELD. I TRIED TO MAKE HIM AWARE OF THE SIT WITH VERBAL INSTRUCTIONS, BUT ONLY AFTER PLACING MY HAND ON THE PWR LEVERS OVER HIS HAND DID HE SEEM TO 'SNAP' OUT OF HIS STATE OF MIND. ONCE THE ACFT HAD STOPPED, OUR POS WAS NOSEWHEEL ACROSS THE HOLD SHORT LINE OF A RWY. THERE WAS CONFLICTING TFC ON THE RWY OR ON APCH. THE CAPT DECIDED TO TURN OFF ON THE NEXT TXWY WITHOUT LETTING ME NOTIFY GND CTL FIRST. AFTER I OBJECTED TO THIS ACTION, GND SPOKE WITH US AND NOTICED THAT WE HAD MISSED OUR TXWY TURN. GND INFORMED US TO PROCEED WITH OUR TAXI. WE APOLOGIZED FOR THE ACTION AND THE CTLR INFORMED US THAT IT WAS NO PROB. DUE TO THE MULTIPLE TIMES IN A TRIP SEQUENCE THAT WE SVC A PARTICULAR ARPT, AN ATTITUDE OF COMPLACENCY AFFECTS HUMAN PERFORMANCE. DILIGENCE WHILE OPERATING AN ACFT IS FOREMOST THE PRIORITY OF EVERYONE IN THE AIR TFC CTL SYS. IF A PERSON FEELS PREOCCUPIED WITH EXTRANEOUS FACTORS, THEY SHOULD RELIEVE THEMSELVES FROM THE OPS SYS. ALL EFFORTS SHOULD BE FOCUSED ON SAFE, PROFESSIONAL OPS WHILE IN THE AIR TFC SYS.

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.