What was found
PILOT REPORTED STANDBY INSTRUMENT AIR PRESSURE INOPERATIVE. ON FURTHER INVESTIGATION FOUND STAND BY VACUUM PUMP DRIVE MOTOR FAILED. RECOMMEND OPERATING SYSTEM AT EACH PHASE INSPECTION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PILOT REPORTED STANDBY INSTRUMENT AIR PRESSURE INOPERATIVE. ON FURTHER INVESTIGATION FOUND STAND BY VACUUM PUMP DRIVE MOTOR FAILED. RECOMMEND OPERATING SYSTEM AT EACH PHASE INSPECTION.