As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERNAL LEAK IN ALTITUDE ENCODER GREATER THAN THE ALLOWED 100 FEET/MINUTE NON- PRESSURIZED AIRCRAFT. THESE ENCODERS ARE NORMALLY VERY REALIABLE, YET RECERTIFICATION SINCE PIPER AIRCRAFT INSTALLATION. POSSIBLE NARCO MANUFACTURE DEFECT IN ASSEMBLY OF PRESSURE SENSOR. LEAKS AROUND GLUE JOINT IN SENSOR. (X)