What was found
APU FAULT, CHRONIC APU STARTING ISSUES AFTER LANDING. PERFORMED APU BITE, IAW FIM 49-11 FT 958, NO FAULTS NOTED ON APU ECU AND NO FAULTS NOTED ON ECU SELF TEST. PERFORMED THREE SUCCESSFUL STARTS, IAW 49-11-00. OPERATIONS CHECKS NORMAL. DUE TO CHRONIC APU FIRST TIME STARTING ISSUE. TRANSFERED TO MDDR 135006, IAW MEL 49-11-01A, CAT C, DUE DATE 06OCT20. REMOVED AND REPLACED APU TRU, IAW AMM 24-32-04-404-003. OPERATIONS GOOD. THIS CLEARS MDDR 135006. PLACARD REMOVED.