As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED A PISTON AIR PUMP (PN IU478-003, SER NR T568A) ON AUG 25, 2005. THE PUMP DRIVE COUPLING FAILED BY 12/06 WITH LESS THAN 66 HOURS ON IT. COUPLING FAILED INTERNALLY IN PUMP, WITH PLASTIC/SILICON DEBRIS IN ENG/DRIVE INTERFACE. (K)