As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED INSTRUMENT AIR PRESSURE LOW AND GYRO WARNING LIGHT ON. UPON TROUBLESHOOTING THE MX DETERMINED THE AIR PUMP WAS NOT PRODUCING ENOUGH PRESSURE AT DIFFERENT POWER SETTINGS. INSTALLED NEW PUMP, SYSTEM WORKED NORMAL. NO PROBABLE CAUSE OR RECOMMENDATIONS AT THIS TIME.