As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STATIC SYSTEM LEAK GREATER THAN 100 FEET/MINUTE TRACKED TO THIS UNIT. AR850 ONLY TWO YEARS IN SERVICE SINCE AIRCRAFT WAS NEW. AR850''S ARE NOT KNOWN TO BE FAULTY IN THIS MANNER. SUBMITTER STATED POSSIBLE NARCO FACTORY DEFECT IN ASSEMBLY OF SENSOR. SECOND FAILURE KNOWN TO THIS SOURCE. (X)