The submitter describes this extinguisher to have passed both weight and pressure checks, and then it was stored appropriately (storage time not provided) while the host aircraft underwent inspection. Upon reinstallation of this unit into the aircraft, the technician noticed the Halon was depleted, even though all safety seals were intact.

Investigation found the cylinder head to be loose and the o-ring damaged. (Shown below are two photographs that accompanied this submission, followed by another Alert report on the same type of bottle.).

Part Total Time: manufacture date 2001.