As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF TASK CARD NR AD20201651-NG-36-2. NR 2 ENG 5TH STAGE BLEED AIR CHECK VALVE FAILED INSPECTION, VALVE REMOVED. GROUNDED-YES. REMOVED NR 2 ENG 5TH STAGE BLEED AIR CHECK VALVE, IAW B737-800 AMM 36-11-02-000-801. INSTALLED NR 2 ENG 5TH STAGE BLEED AIR CHECK VALVE, REF AMM 36-11-02-400-801. OPS CHECK GOOD. NO LEAKS NOTED.