What was found
TECH SERVICES REQUEST TO ACCOMPLISH #1 ENGINE BLEED AIR SYSTEM HEALTH CHECK. GROUNDED - YES. WHILE PERFORMING ASA TASK CARD NG-36WC-00001 FOUND HIGH STAGE REGULATOR (HSR) LEAKING FROM REVERSE FLOW DIAPHRAGM. REMOVED AND REPLACED HSR, LEAK CHECKED GOOD B737-900 AMM 36-11-07-400-801. SUSPECT PRSOV AND BLEED AIR REGULATOR ARE BFS DUE TO NO ENG BLEED AIR AFTER REPLACEMENT. AFTER REPLACEMENT OF DEFECTIVE COMPONENTS FINISH TASK CARD ASA NG-36WC-00001. REMOVED & REPLACED #1 ENG PRSOV & BAR REF AMM 36-11-04 & AMM 36-11-03. NO HELP, STILL NO ENG BLEED L/H. REMOVED & REPLACED AIR CONDITIONING MODULE REF AMM 21-51-65. REMOVED & REPLACED BAR REF AMM 36-11-03, LEAK & OPS CHECKED GOOD. ACCOMPLISHED ENG. BLEED AIR CROSSOVER OPERATIONAL TEST REF AMM 36-11-00-710-801. OPS CHECKED GOOD.