What was found
BLEED CTRL ICING INHIB L INHIBIT FUNCTION FROM THE AIR SUPPLY CONTROLLER (ASC) TO ENGINE ANTI ICE (EAI) SYSTEM HAS FAILED.FROM AHM: ENGINE-1 INTERMEDIATE DUCT PRESSURE SENSOR SIGNAL IS OUT OF RANGE DETECTED BY: INTEGRATED AIR SYSTEMS CONTROLLER (IASC)-LEFT. 1AE. L ENGINE HP VLV IS SECURED CLOSED. MAINTENANCE MESSAGE : 36-21010. INITIAL EVAL MAINTENANCE MESSAGE OCCURED DURING THE CLIMB FLIGHT PHASE. REF FIM 36-21 TASK 801 STEP D (1) FAULT ISOLATION PROCEDURE (CLIMB) REPLACE PRESSURE REGULATION SHUTOFF VALVE. PART NIS GUM. ENG 1 PRSOV REPLACED REF L/P 9218750. ENG 1 HPSOV REACTIVATED REF AMM 36-00-00-440-803. FAULT MSG 36-11020 'ENG 1 HPSOV NOT IN COMMANDED POSITION' IS LATCHED. NO OTHER FAULTS PRESENT. REQUIRES PNEUMATIC ENGINE ON- SYSTEM TEST REF FIM 36-11 TASK 802. REPLACED E1 HPSOV REF AMM 36-11-07. INSTALL LEAK CHECK GOOD. LRU REPLACEMENT TEST AND PNUEMATIC ENGINE ON SYSTEM TEST FAILED. NO HELP. FAULT REMAINED.