Air carrier small transport unauthorized taxi runway entry.

Attributes
ACN	180331
Time
Date	199106
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bfi
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Small Transport
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 2600 flight time type : 50
ASRS Report	180331
Person 2
Affiliation	government : faa
Function	controller : ground
Qualification	controller : non radar
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airport	other physical facility

Narrative:

After receiving taxi clearance I started to taxi toward what I thought was the taxiway paralleling the runway. When I turned to start down the taxiway I found that I was actually turning onto the runway. I made a quick exit and taxied away from the runway west/O incident. Having not been to bfi before I should have asked for clearer instructions. However, the ground controller was very busy and I really thought I was going the right way. Better runway marking and taxiway marking would have been a big help. I understand this is a common problem at bfi. Even with the aid of a ground taxi map sitting low to the ground this really in an easy mistake to make. Later in the day I spoke with the controller who was working ground and she told me I did not cause a problem but also that this was not uncommon at bfi.

Original NASA ASRS Text

Title: ACR SMT UNAUTH TAXI RWY ENTRY.

Narrative: AFTER RECEIVING TAXI CLRNC I STARTED TO TAXI TOWARD WHAT I THOUGHT WAS THE TXWY PARALLELING THE RWY. WHEN I TURNED TO START DOWN THE TXWY I FOUND THAT I WAS ACTUALLY TURNING ONTO THE RWY. I MADE A QUICK EXIT AND TAXIED AWAY FROM THE RWY W/O INCIDENT. HAVING NOT BEEN TO BFI BEFORE I SHOULD HAVE ASKED FOR CLEARER INSTRUCTIONS. HOWEVER, THE GND CTLR WAS VERY BUSY AND I REALLY THOUGHT I WAS GOING THE RIGHT WAY. BETTER RWY MARKING AND TXWY MARKING WOULD HAVE BEEN A BIG HELP. I UNDERSTAND THIS IS A COMMON PROBLEM AT BFI. EVEN WITH THE AID OF A GND TAXI MAP SITTING LOW TO THE GND THIS REALLY IN AN EASY MISTAKE TO MAKE. LATER IN THE DAY I SPOKE WITH THE CTLR WHO WAS WORKING GND AND SHE TOLD ME I DID NOT CAUSE A PROB BUT ALSO THAT THIS WAS NOT UNCOMMON AT BFI.

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.