Tower controller reported clearing an AA2 for takeoff; having forgotten an airport vehicle was on th...

Narrative:

I was working local and ground control combined. I had airport security on runway 8 looking for birds on or near the runway because an aircraft had reported sightings of birds near the runway to the previous controller. I later cleared aircraft X for takeoff off of runway 8 and right after this airport security reported clear of runway 8 and standing by. The aircraft had just started to move from his stopped position and had not yet crossed the hold short lines of runway 8 at this time; so I told aircraft X cancel takeoff clearance then verified with the vehicle as well as visually scanning that airport security was indeed clear of runway 8 and proceeded to clear aircraft X for takeoff again. Maybe a flashing runway incursion light that makes noise.

Original NASA ASRS Text

Title: Tower Controller reported clearing an AA2 for takeoff; having forgotten an airport vehicle was on the runway. The clearance was canceled before any conflict developed.

Narrative: I was working Local and Ground control combined. I had airport security on Runway 8 looking for birds on or near the runway because an aircraft had reported sightings of birds near the runway to the previous Controller. I later cleared Aircraft X for takeoff off of Runway 8 and right after this airport security reported clear of Runway 8 and standing by. The aircraft had just started to move from his stopped position and had not yet crossed the hold short lines of Runway 8 at this time; so I told Aircraft X cancel takeoff clearance then verified with the vehicle as well as visually scanning that airport security was indeed clear of Runway 8 and proceeded to clear Aircraft X for takeoff again. Maybe a flashing runway incursion light that makes noise.

Data retrieved from NASA's ASRS site as of July 2013 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	986580
Time
Date	201201
Local Time Of Day	0001-0600
Place
Locale Reference	ITO.Airport
State Reference	HI
Aircraft 1
Make Model Name	Grumman American Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Route In Use	None
Flight Plan	IFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy

Tower controller reported clearing an AA2 for takeoff; having forgotten an airport vehicle was on the runway. The clearance was canceled before any conflict developed.