A B737 FLIGHT CREW NOTICED ABNORMALLY LOW AIRFLOW FROM THE LAVATORY VENT. THEY WROTE UP THE DISCREPANCY AND WERE DISAPPOINTED WHEN THE MAINTENANCE RESOLUTION WAS TO ACCEPT THE LOW FLOW AS NORMAL.

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PLEASE REFER TO PAGE XXX IN THE LOG; FOR ACFT X. BOTH MYSELF AND FO FELT THE AIRFLOW (IN THE AIR AS WELL AS ON THE GND) FROM THE OVERHEAD VENT IN THE FORWARD TOILET WAS VERY LOW. THE A AND C FLT ATTENDANTS CONCURRED WITH OUR ASSESSMENT AND A LOG ENTRY TO THAT EFFECT WAS MADE. THE WRITE OFF WAS 'AIRFLOW CHKS OK.' AS THE MECH WAS NO LONGER AVAILABLE I TELEPHONED MAINT FOR THE B737 AT APPROX XA30Z. THE PERSON I SPOKE TO INFORMED ME THAT HE SPOKE AT LENGTH WITH THE MECH INVOLVED AND THAT THEY FELT THE AIRFLOW WAS ACCEPTABLE AS THERE IS NO REAL STANDARD FOR 'AIRFLOW.' HE FURTHER INFORMED ME THAT THE ONLY WAY THAT THIS COULD BE INVESTIGATED IS TO TAKE IT TO THE HANGAR FOR INSPECTION AND HE WAS NOT GOING TO DO THAT. 5 DIFFERENT PEOPLE FEEL THAT THERE IS SOMETHING WRONG WITH THE AIRFLOW IN THE TOILET OF ACFT X. WHY PUT SOMETHING IN THE LOG IF MAINT IS NOT GOING TO INVESTIGATE IT. THIS ITEM SHOULD HAVE BEEN PROGRAMMED FOR FURTHER INSPECTION AND CORRECTION AND THE NEXT MAINT OVERNIGHT. THIS IS SYSTEMIC (NOT FIXING LOG ITEMS) AT ACR. IN THIS CASE THE MAINT DEPT ENDANGERED THE CREW'S (AS WELL AS ALL THE PAX) HEALTH SINCE THERE WERE FINE FIBERGLASS PARTICLES COMING OUT OF THE OVERHEAD. THIS IS A KNOWN HEALTH HAZARD.