As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING MAINT LIGHT ON OVERHEAD PANNEL ILLUMINATED. GROUNDED - YES. MAINT MSG 36-12021 FOUND ON INBOUND FLIGHT DECK EFFECT STATUS MSG BLEED FAMU. C/W MAINTENANCE MESSAGES B737-9 FIM 36-12021 FAN AIR MODULATING VALVE. OPS CHECKS GOOD IAW B737-9 AMM 36-00-00.