What was found
FWD EQUIPMENT VALVE EICAS AFTER LANDING. MTC PERFORMED OPERATION TEST OF EQUIPMENT COOLING PER AMM 21-58-00 OPS CHECK GOOD AIRCRAFT REMAINS ETOPS 180 MIN. FWD EQUPMENT VLV RETURNED ON EICAS DURING TAXI. CREW RETURNED TO THE GATE (BTB). MTC DEFFERED FWD EQUIPMENT OUTBD VALVE PER MEL 21-58-7-2-1 PLACARD INSTALLED MAINTENANCE PROCEDURES CARRIED OUT MBCB SEPT 30, 2026. AIRCRAFT REMAINS ETOPS 180. A/C RETURNED TO SERVICE.