Teb tower controller reported of a runway incursion involving a tug driver with an aircraft on final...

Attributes
ACN	1395997
Time
Date	201610
Local Time Of Day	1201-1800
Place
Locale Reference	TEB.Tower
State Reference	NJ
Environment
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Taxi
Route In Use	None
Person 1
Function	Supervisor / CIC
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (mon) 8 Air Traffic Control Time Certified In Pos 1 (yrs) 4
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Critical Deviation - Procedural Clearance Ground Incursion Runway

Narrative:

I was on the controller in charge position standing in the back of the cab facing the operation. Everything seemed normal. My ground controller was working the traffic like normal. I hear the ground controller say something to the effect of 'what the hell'; and immediately tell the local controller to send that plane around.what I understand is [controller] issued a tug and company (2 tugs pulling gulfstream sized aircraft (they had 1 radio)) on taxiway golf to hold short of taxiway lima. Then after an aircraft passed [controller] told the tugs to hold short of runway 19. The tug driver misheard and crossed runway 19 at golf and both tugs proceeded to cross the runway with an aircraft on final for runway 19 about half a mile out. When I noticed the situation the last aircraft being towed; its tail was basically past the halfway point of the runway center line to complete the crossing and the aircraft on finally still had about .25 mile to go till the runway threshold. Aircraft went around and was resequenced without further incident and landed.

Original NASA ASRS Text

Title: TEB Tower Controller reported of a runway incursion involving a tug driver with an aircraft on final.

Narrative: I was on the Controller in Charge position standing in the back of the cab facing the operation. Everything seemed normal. My ground controller was working the traffic like normal. I hear the ground controller say something to the effect of 'what the hell'; and immediately tell the local controller to send that plane around.What I understand is [controller] issued a tug and company (2 tugs pulling gulfstream sized aircraft (they had 1 radio)) on Taxiway Golf to hold short of Taxiway Lima. Then after an aircraft passed [controller] told the tugs to hold short of Runway 19. The tug driver misheard and crossed Runway 19 at Golf and both tugs proceeded to cross the runway with an aircraft on final for Runway 19 about half a mile out. When I noticed the situation the last aircraft being towed; its tail was basically past the halfway point of the runway center line to complete the crossing and the aircraft on finally still had about .25 mile to go till the runway threshold. Aircraft went around and was resequenced without further incident and landed.

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.