As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) VACUUM MANIFOLD WAS TESTED DURING 200 HR INSPECTION OF THE ACFT. LEFT LOW VACUUM LIGHT WOULD NOT COME ON. SWITCH FOUND TO BE UNSERVICEABLE. VACUUM MANIFOLD WAS MFG IN SEPTEMBER 2010 AND INSTALLED NEW IN THE ACFT IN APRIL 2011. VACUUM MANIFOLD REPACED.