As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN ANNUAL INSPECTION, THE CABIN PORTABLE FIRE EXTINGUISHER DISTRIBUTED UNDER PIPER P/N: 459-887, FAILED WEIGHT CHECK. BOTTLE DOES NOT HAVE A PRESSURE GAUGE. SEVERAL OTHER BOTTLES HAVE BEEN FOUND IN THIS CONDITION. SUSPECT TOP/NOZZLE ASSY LOOSENS AND PRESSURE BLEEDS DOWN. SUBMITTER RECOMMENDED A ROUTINE INSPECTION OF BOTTLE AND ADDITION OF AN ALIGNMENT LINE FROM BOTTLE TO NOZZLE WITH TORQUE SEAL. (DUE TO THE HIGH COST OF HALON, THESE SMALLER AND CHEAPER BOTTLES ARE BEING INSTALLED).