As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OVERHEAD MAINT LIGHT ILLIMINATED. GROUNDED - YES. FOUND BLEED FAMV R STATUS MESSAGE. C/W B737-9 IFIM TASK 31-00-00-810-801 & FOUND FAULT CODE 36-12021 IN LINE MAINT FDE. C/W IFIM 36-12-00-810-802 INITIAL EVALUATION - PNEUMATIC ENG ON - SYSTEM TEST B737-9 AMM 36-00-020-730-801, SYSTEM TEST PASSED & FAULT CLEARED. APPEARS TO BE INTERMITTENT. MAINT LIGHT IS NOW OUT.