Unauthorized taxi during reduced visibility by an MD10 cargo flight at aus, tx.

Attributes
ACN	614384
Time
Date	200404
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : aus.airport
State Reference	TX
Altitude	agl single value : 0
Environment
Weather Elements	Fog
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ord.tower
Operator	common carrier : air carrier
Make Model Name	DC-10 Undifferentiated or Other Model
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 : instrument pilot : commercial pilot : atp pilot : multi engine
Experience	flight time last 90 days : 110 flight time total : 7000 flight time type : 1400
ASRS Report	614384
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	incursion : taxiway inflight encounter : weather non adherence : far non adherence : clearance non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Environmental Factor Flight Crew Human Performance Weather ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

WX was 1/2 mi, fog. We called for taxi from cargo ramp (aus) to runway 17R. Aircraft had to report position because of fog. Ground controller was extremely busy. We called for taxi and thought he said 'cleared to taxi runway 17R.' we were very close to runway 17R, so quickly changed to tower who told us ground was unaware we were taxiing. We should have clarified with ground, but he was extremely busy and we were so close to runway, we did not.

Original NASA ASRS Text

Title: UNAUTH TAXI DURING REDUCED VISIBILITY BY AN MD10 CARGO FLT AT AUS, TX.

Narrative: WX WAS 1/2 MI, FOG. WE CALLED FOR TAXI FROM CARGO RAMP (AUS) TO RWY 17R. ACFT HAD TO RPT POS BECAUSE OF FOG. GND CTLR WAS EXTREMELY BUSY. WE CALLED FOR TAXI AND THOUGHT HE SAID 'CLRED TO TAXI RWY 17R.' WE WERE VERY CLOSE TO RWY 17R, SO QUICKLY CHANGED TO TWR WHO TOLD US GND WAS UNAWARE WE WERE TAXIING. WE SHOULD HAVE CLARIFIED WITH GND, BUT HE WAS EXTREMELY BUSY AND WE WERE SO CLOSE TO RWY, WE DID NOT.

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.