What was found
APU TREND DATA SHOWS CT5ATP TEMP IS APPROACHING THE 605 DEGREES THRESHOLD AGAIN. ETOPS SIGNIFICANT SYSTEM TASK AFFECTS APU ON DEMAND IN-FLIGHT START CAPABILITY. UPON COMPLETION, CONTACT MAINTENANCE CONTROL AND REPORT THAT THIS TASK HAS AFFECTED APU IN-FLIGHT START CAPABILITY, ASA MEL 49- 99A IS REQUIRED PRIOR TO FLIGHT. GROUNDED - YES. COMPLETED B737-900 FIM 49-40 TASK 825 PER FIM. DURING FUEL NOZZLE INSPECITON, FOUND COKING ON NOZZLES AND SHROUDS THAT COULD HAVE CAUSED UNEVEN SPRAY PATTERNS. CHANGED APU FUEL NOZZLES AND SHROUDS REF B737-900 AMM 49-31-14-400-801. OPS CHECK GOOD AND NO LEAKS DETECTED.