Narrative:

ZJX called to say that a canine handler in training at sju had left a package of C4 explosive onboard the aircraft. He said it was in seat 1J magazine holder. We found the package and on arrival at the gate I handed it to captain xx of dfw security. Callback conversation with reporter revealed the following information: reporter states the explosive was not a hazard unless one had a detonator. It was placed in the cockpit in the crew drawer during the flight. There has been no follow up of any nature but the company has changed its policy and will not allow such training aboard their aircraft anymore. The canine team was called away on another mission and forgot the explosive.

Related reports:

Google
 

Original NASA ASRS Text

Title: WHILE AIRBORNE A DC10 FLC RECEIVES WORD THAT A C4 EXPLOSIVE PACKAGE WAS LEFT IN THE SEAT POCKET WHILE DOG TRAINING WAS IN PROGRESS. IT WAS FOUND AND GIVEN TO SECURITY UPON ARR.

Narrative: ZJX CALLED TO SAY THAT A CANINE HANDLER IN TRAINING AT SJU HAD LEFT A PACKAGE OF C4 EXPLOSIVE ONBOARD THE ACFT. HE SAID IT WAS IN SEAT 1J MAGAZINE HOLDER. WE FOUND THE PACKAGE AND ON ARR AT THE GATE I HANDED IT TO CAPT XX OF DFW SECURITY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THE EXPLOSIVE WAS NOT A HAZARD UNLESS ONE HAD A DETONATOR. IT WAS PLACED IN THE COCKPIT IN THE CREW DRAWER DURING THE FLT. THERE HAS BEEN NO FOLLOW UP OF ANY NATURE BUT THE COMPANY HAS CHANGED ITS POLICY AND WILL NOT ALLOW SUCH TRAINING ABOARD THEIR ACFT ANYMORE. THE CANINE TEAM WAS CALLED AWAY ON ANOTHER MISSION AND FORGOT THE EXPLOSIVE.

Data retrieved from NASA's ASRS site as of July 2007 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.