Narrative:

After loading aircraft I did the paperwork; weight and balance; air manifest; and closed the cabin door. I did a last check for obstacles from the front of the aircraft on both sides. There I failed to notice that the tail stand was still on. Before starting engine checklist called for the tail stand. I thought at the time it was in the aircraft. I started up; taxied and took off. About 15-20 minutes into the flight; approach control reported to me that someone at the air national guard ramp noticed an 'orange streamer' from my aircraft. I thought about what it could be but did not connect with what it really was. I continued the flight to ZZZ and parked the aircraft. When I opened the cabin door to get the tail stand I realized what had happened. I immediately called ZZZ tower by radio; then departure tower by phone. Ten minutes later a ZZZ airport car pulled over to the aircraft with the tail stand which he located on the taxiway. I also notified flight control; maintenance; and mr. X. The engine nacelles obscure the view aft from in front of the aircraft. I sure will do a complete walk around before climbing into the cockpit instead of just check from the front of aircraft only.

Google
 

Original NASA ASRS Text

Title: BE99 pilot reports departing with the tail stand still attached to the aircraft. The omission is not detected until the stand is found missing from its normal stowage location on post flight.

Narrative: After loading aircraft I did the paperwork; weight and balance; air manifest; and closed the cabin door. I did a last check for obstacles from the front of the aircraft on both sides. There I failed to notice that the tail stand was still on. Before starting engine checklist called for the tail stand. I thought at the time it was in the aircraft. I started up; taxied and took off. About 15-20 minutes into the flight; Approach Control reported to me that someone at the Air National Guard ramp noticed an 'orange streamer' from my aircraft. I thought about what it could be but did not connect with what it really was. I continued the flight to ZZZ and parked the aircraft. When I opened the cabin door to get the tail stand I realized what had happened. I immediately called ZZZ Tower by radio; then departure Tower by phone. Ten minutes later a ZZZ airport car pulled over to the aircraft with the tail stand which he located on the taxiway. I also notified Flight Control; Maintenance; and Mr. X. The engine nacelles obscure the view aft from in front of the aircraft. I sure will do a complete walk around before climbing into the cockpit instead of just check from the front of aircraft only.

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.