Halcyon recalls some Explorers 40 wings sold after July 2005 that could develop problems over time. In these few units it is possible that the over pressure valve (OPV) could delaminate, causing the BC to leak.
Here are serial numbers:
http://www.halcyon.net/recall/
Mania
Here are serial numbers:
http://www.halcyon.net/recall/
Mania