Mechanic taxiing air carrier light transport to ramp in dense fog taxied onto runway without clearan...

Attributes
ACN	168547
Time
Date	199101
Day	Sun
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : pdx
State Reference	OR
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	ground other : taxi
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other pilot : private
ASRS Report	168547
Person 2
Affiliation	government : faa
Function	controller : ground
Qualification	controller : radar
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

A & P mechanic with private rating taxiing aircraft from hangar to passenger gate area at pdx. RVR minimal, ground radar being used. 1 of 3 company aircraft taxiing group. Aircraft taxied onto runway area west/O clearance to do so. All 3 mechanics taxiing aircraft were unfamiliar with pdx. Ground control failed to give precise progressive taxi and became confused as to which aircraft was where because of being in group. People taxiing aircraft unfamiliar with airport and in a dense fog became confused and disorientated as to where they were and what ground control wanted done.

Original NASA ASRS Text

Title: MECHANIC TAXIING ACR LTT TO RAMP IN DENSE FOG TAXIED ONTO RWY WITHOUT CLRNC.

Narrative: A & P MECH WITH PVT RATING TAXIING ACFT FROM HANGAR TO PAX GATE AREA AT PDX. RVR MINIMAL, GND RADAR BEING USED. 1 OF 3 COMPANY ACFT TAXIING GROUP. ACFT TAXIED ONTO RWY AREA W/O CLRNC TO DO SO. ALL 3 MECHS TAXIING ACFT WERE UNFAMILIAR WITH PDX. GND CTL FAILED TO GIVE PRECISE PROGRESSIVE TAXI AND BECAME CONFUSED AS TO WHICH ACFT WAS WHERE BECAUSE OF BEING IN GROUP. PEOPLE TAXIING ACFT UNFAMILIAR WITH ARPT AND IN A DENSE FOG BECAME CONFUSED AND DISORIENTATED AS TO WHERE THEY WERE AND WHAT GND CTL WANTED DONE.

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.

Mechanic taxiing air carrier light transport to ramp in dense fog taxied onto runway without clearance.