What was found
SPRING ON SHUTTLE VALVE FLAPPER DOOR (ENGINE DRIVEN VACUUM PUMP SIDE) BROKE SHELLING OUT ENGINE DRIVEN VACUUM PUMP THUS ALLOWING ENGINE VACUUM TO VENT THROUGH ENGINE DRIVEN PUMP, CAUSING TOTAL LOSS OF VACUUM SYSTEM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
SPRING ON SHUTTLE VALVE FLAPPER DOOR (ENGINE DRIVEN VACUUM PUMP SIDE) BROKE SHELLING OUT ENGINE DRIVEN VACUUM PUMP THUS ALLOWING ENGINE VACUUM TO VENT THROUGH ENGINE DRIVEN PUMP, CAUSING TOTAL LOSS OF VACUUM SYSTEM.