As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - WHILE TROUBLESHOOTING A BLEED FAULT FOUND IP CHECK VALVE DOWEL PIN MISSING.//REMOVED AND REPLACED #1 ENG IP CHECK VALVE PER AMM 36-11-41. GK2158677 30SEP21. OPS CHECK, LEAK CHECK PENDING. OPS/LEAK CHECK OK. AIRCRAFT OK FOR SVC.