B727 crew taxies without clearance at tys.

Attributes
ACN	428983
Time
Date	199902
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : tys.airport
State Reference	TN
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
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 : 200 flight time total : 8000 flight time type : 5000
ASRS Report	428983
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 40 flight time total : 2500 flight time type : 40
ASRS Report	429178
Events
Anomaly	incursion : taxiway non adherence : far other anomaly other
Independent Detector	aircraft equipment : tcas aircraft equipment other aircraft equipment : 4
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After starting engines, I motioned for the first officer to call for taxi. We became distraction with other cockpit duties. After getting those matters resolved, I began taxiing, thinking we had clearance. The end of the runway was at the end of the ramp, so we did not cross any active runways. No conflicts with other aircraft or vehicles existed. This is a classic example of flying the trip regularly and being a creature of habit or repetition, then getting distraction in other duties and reacting out of habit.

Original NASA ASRS Text

Title: B727 CREW TAXIES WITHOUT CLRNC AT TYS.

Narrative: AFTER STARTING ENGS, I MOTIONED FOR THE FO TO CALL FOR TAXI. WE BECAME DISTR WITH OTHER COCKPIT DUTIES. AFTER GETTING THOSE MATTERS RESOLVED, I BEGAN TAXIING, THINKING WE HAD CLRNC. THE END OF THE RWY WAS AT THE END OF THE RAMP, SO WE DID NOT CROSS ANY ACTIVE RWYS. NO CONFLICTS WITH OTHER ACFT OR VEHICLES EXISTED. THIS IS A CLASSIC EXAMPLE OF FLYING THE TRIP REGULARLY AND BEING A CREATURE OF HABIT OR REPETITION, THEN GETTING DISTR IN OTHER DUTIES AND REACTING OUT OF HABIT.

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.