As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST VNAV ON ARRIVAL ARRIVED TRACK AND FIXES DISAPPEARED AT 8000 MSL. GROUNDED - YES. DFCS FAULT REVIEW SHOWED PITCH MODE REVERSION FROM VNAV PATH DUE TO FMC DATA INVALID WITH FAULT CODE 22-11822. ACCOMPLISHED T/S FOR FAULT 22-11822 PER B737-900 FIM 22-11 TASK 811 - INITIAL EVALUATION DID NOT CONFIRM FAULT. PERFORMED DFCS GROUP #34 (FMC LRU REPLACEMENT) TEST PER FIM 22-11 TASK 802 - ALL TESTS PASS.