What was found
APU FAULT LIGHT ILLUMINATED ON START. 1ST ATTEMPT. GROUNDED - YES. ATTEMPTED APU START. NO-START, BITE CHECK RECEIVED FAULT MESSAGE 49-41011 NO FLAME SHUTDOWN. REF B737-800 FIM 49-40 TASK 802. PERFORMED GVI OF TAILCONE & ADJACENT CONTROL SURFACES FOR DAMAGE, NONE FOUND, NO DEFECTS NOTED. CHECKED & RELEASED PER MEL 49-1B. REPLACED EXCITER BOX, IGNITER LEAD AND HARNESS. REF B737-800 AMM 49-41-31, 49-41-51, 49-41-52. APU START AND SHUT DOWN NORMAL THREE TIMES. MEL 49-1B CLEARED.