As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE HIGH STAGE VALVE FAILED BLEED AIR HEALTH CHECK, REF TASK CARD NG-36WC-00001 STEP 4.K.3 (C). GROUNDED-YES. REMOVED AND REPLACED NR 1 ENG HIGH STAGE VALVE, REF B737-900 AMM 36-11-06-000-801 AND AMM 36-11-06-400-801. OPS CHECK GOOD.