Bfi ground controller reports of an aircraft taxiing across a runway that the aircraft was never cle...

Narrative:

I was working the ground control position and controller in charge combined. Aircraft X landed runway 13R and was instructed to make a 180 and exit at A1; which is an intersection that does not cross runway 13L. I was making a new ATIS when aircraft X called for taxi from A2. It was sunset and when I scanned A2 I did not see the aircraft was between the runways. I taxied him to parking and I realized he was crossing runway 13L. Another aircraft was in the pattern for runway 13L and was on short final. I did not stop aircraft X as he was already clearing the runway. Aircraft on final went around and aircraft X was clear of the runway by the time aircraft on short final crossed the threshold. I asked lcw if aircraft X was cleared to cross and lcw informed me aircraft X was not instructed to cross nor did I give aircraft X a clearance to cross. I issued the brasher statement but aircraft X did not respond. I made several other attempts to contact aircraft X on ground control frequency but never got a response. I should have confirmed he was at A2 and instructed him to hold short of the runway; although by the time he called for taxi he was already on the runway.

Original NASA ASRS Text

Title: BFI Ground Controller reports of an aircraft taxiing across a runway that the aircraft was never cleared to cross. The Ground Controller looked for the aircraft; didn't see it; and issued instructions.

Narrative: I was working the Ground Control position and CIC combined. Aircraft X landed Runway 13R and was instructed to make a 180 and exit at A1; which is an intersection that does not cross Runway 13L. I was making a new ATIS when Aircraft X called for taxi from A2. It was sunset and when I scanned A2 I did not see the aircraft was between the runways. I taxied him to parking and I realized he was crossing Runway 13L. Another aircraft was in the pattern for Runway 13L and was on short final. I did not stop Aircraft X as he was already clearing the runway. Aircraft on final went around and Aircraft X was clear of the runway by the time aircraft on short final crossed the threshold. I asked LCW if Aircraft X was cleared to cross and LCW informed me Aircraft X was not instructed to cross nor did I give Aircraft X a clearance to cross. I issued the Brasher Statement but Aircraft X did not respond. I made several other attempts to contact Aircraft X on Ground Control frequency but never got a response. I should have confirmed he was at A2 and instructed him to hold short of the runway; although by the time he called for taxi he was already on the runway.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1195922
Time
Date	201408
Local Time Of Day	0001-0600
Place
Locale Reference	BFI.Airport
State Reference	WA
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Route In Use	None
Person 1
Function	Ground
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (mon) 6
Events
Anomaly	ATC Issue All Types Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Ground Incursion Runway

Bfi ground controller reports of an aircraft taxiing across a runway that the aircraft was never cleared to cross. The ground controller looked for the aircraft; didn't see it; and issued instructions.