As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TWO EACH CESSNA 152 FLIGHT SCHOOL AIRCRAFT REPORTED VACUUM INSTRUMENT PROBLEMS. FOUND VACUUM SYSTEM HOSES WERE CRUMBLING AND IN VERY POOR CONDITION, ALSO, ONE VACUUM PUMP FAILURE DUE TO INJESTION OF RED INNER SLEEVE PARTICLES FROM HOSES. CESSNA SEB 96-10 COVERS THE FAILURE ON THIS SERIES OF HOSE.