What was found
NO APU BLEED AIR PRESSURE AFTER APU START. REMOVED AND INSTALLED SERVICEABLE P2 SENSOR ON APU IAW AMM 49-61-04 OPS CHECKED AND FOUND OPERATING NORMAL AT THIS TIME. REMOVED AND REPLACED APU FLOW SENSING MODULE, OPS CHECK OF MODULE SATISFACTORY REF AMM 49-53-08, ALSO CHECKED IGV FOR PLAY AND PROPER PUSH/PULL LIMITS. TENSION IS WITHIN LIMITS. PERFORMED ECM ACTION ITEMS 1-5, NO FAULTS FOUND, R & R APU ECU IAW AMM 49-61-05. PERFORMED FIM 49-11 FAULT TREE A05. NO HELP. ACCOMPLISHED W/O 49770 REPLACED APU I.A.W AMM 49-11-01 OPS CHECK NORMAL.