Narrative:

It was still dark out when I issued taxi instructions to a PA28 to [taxi to] runway 7 via taxiway F. After a minute or so had passed and I hadn't seen the aircraft begin his taxi; I asked him where he was. This is not uncommon [here] as there are tie downs that are obscured by a hangar. He told me he just passed an intersection and was going to have to get out of the aircraft and assess some damage. I again asked him where he was and found him off the pavement of a service road south of taxiway F. He didn't have any lights on the airplane at all. His left wing had struck a 'this is not a taxiway' sign on the service road which spun him off of it into the grass. I informed him that anytime an aircraft goes off the pavement we have a requirement to advise the fire house. The controller in charge in the tower made the call to the airport/crash fire rescue equipment and prompted a response to the aircraft.

Google
 

Original NASA ASRS Text

Title: Local Controller reports that a PA28 pilot advised that his aircraft struck a sign on an off-taxiway service road while taxiing in the dark.

Narrative: It was still dark out when I issued taxi instructions to a PA28 to [taxi to] Runway 7 via Taxiway F. After a minute or so had passed and I hadn't seen the aircraft begin his taxi; I asked him where he was. This is not uncommon [here] as there are tie downs that are obscured by a hangar. He told me he just passed an intersection and was going to have to get out of the aircraft and assess some damage. I again asked him where he was and found him off the pavement of a service road south of Taxiway F. He didn't have any lights on the airplane at all. His left wing had struck a 'This is not a taxiway' sign on the service road which spun him off of it into the grass. I informed him that anytime an aircraft goes off the pavement we have a requirement to advise the fire house. The CIC in the Tower made the call to the airport/CFR and prompted a response to the aircraft.

Data retrieved from NASA's ASRS site as of April 2012 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.