Taxi clearance interpretation causes a near taxi error. Taxiing traffic.

Attributes
ACN	296347
Time
Date	199502
Day	Fri
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : las
State Reference	NV
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
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	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 180 flight time total : 8000 flight time type : 1000
ASRS Report	296347
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 270 flight time total : 10800 flight time type : 45
ASRS Report	296339
Events
Anomaly	non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : became reoriented
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I misinterpreted the assigned taxi route. Even though the first officer pointed out my mistake twice, and I could see the taxiway designator signs, I could not realize my mistake. We went 100-200 ft past a taxiway we were supposed to turn on. The cause of this problem was a high level of fatigue brought on by a lengthy duty period (11 hours, 15 min schedule). At the time of the incident we were 7 hours into the duty period and my body time was XX12 am. Red-eye flying duty periods need to be restr differently than those scheduled in concert with a crew member's circadian cycles. 11 hours is too long. Supplemental information from acn 296339: the crew had flown 1 leg from mem to las. The crew started the trip feb/xx/95 at XA00 pm. Flew from mem to las. Crew sat on the ground for 3 hours. I feel the captain was accustomed to using B-5 to taxi to runway 25R in his previous GPS at las. Also the time of day and fatigue may have played a part in the misunderstanding of the taxi clearance. I also believe our company cockpit resource management training worked here, where my assertiveness got his attention, that there may be a problem. And we took appropriate action to resolve the problem.

Original NASA ASRS Text

Title: TAXI CLRNC INTERP CAUSES A NEAR TAXI ERROR. TAXIING TFC.

Narrative: I MISINTERPRETED THE ASSIGNED TAXI RTE. EVEN THOUGH THE FO POINTED OUT MY MISTAKE TWICE, AND I COULD SEE THE TXWY DESIGNATOR SIGNS, I COULD NOT REALIZE MY MISTAKE. WE WENT 100-200 FT PAST A TXWY WE WERE SUPPOSED TO TURN ON. THE CAUSE OF THIS PROB WAS A HIGH LEVEL OF FATIGUE BROUGHT ON BY A LENGTHY DUTY PERIOD (11 HRS, 15 MIN SCHEDULE). AT THE TIME OF THE INCIDENT WE WERE 7 HRS INTO THE DUTY PERIOD AND MY BODY TIME WAS XX12 AM. RED-EYE FLYING DUTY PERIODS NEED TO BE RESTR DIFFERENTLY THAN THOSE SCHEDULED IN CONCERT WITH A CREW MEMBER'S CIRCADIAN CYCLES. 11 HRS IS TOO LONG. SUPPLEMENTAL INFO FROM ACN 296339: THE CREW HAD FLOWN 1 LEG FROM MEM TO LAS. THE CREW STARTED THE TRIP FEB/XX/95 AT XA00 PM. FLEW FROM MEM TO LAS. CREW SAT ON THE GND FOR 3 HRS. I FEEL THE CAPT WAS ACCUSTOMED TO USING B-5 TO TAXI TO RWY 25R IN HIS PREVIOUS GPS AT LAS. ALSO THE TIME OF DAY AND FATIGUE MAY HAVE PLAYED A PART IN THE MISUNDERSTANDING OF THE TAXI CLRNC. I ALSO BELIEVE OUR COMPANY COCKPIT RESOURCE MGMNT TRAINING WORKED HERE, WHERE MY ASSERTIVENESS GOT HIS ATTN, THAT THERE MAY BE A PROB. AND WE TOOK APPROPRIATE ACTION TO RESOLVE THE PROB.

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.