What was found
DURING MAINTENANCE TOW, BLUE APU MAINT LIGHT ILLUMINATED. ACFT GROUNDED. IAW FIM 49-60 TASK 801, PERFORMED APU BITE, FOUND MAINT MESSAGE 49-91227 LOW OIL QTY, IAW AMM 12-13-31-200-801. INSPECTED APU OIL LEVEL, APU OIL QTY WAS FOUND TO BE FULL, NO SERVICING REQUIRED. CHECKED APU BITE, NO CURRENT MAINTENANCE MESSAGES FOUND, INTERMITTENT FAULT. BLUE MAINT LIGHT EXTINGUISHED.