As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT PILOT VERBAL RH T/R REV. ISLN VALVE EICAS MEASAGE .APPEARED.A/C RETURNED TO GATE (BTB) AND MTX GROUNDED A/C . MTX DEFERRED RH T/R FOR DEARTURE IAW MEL 78-31-1 MX PROCEDURES ACCOMPLISHED PLACARDS INSTALLED MBCB 01/13/26.AND RETURNED A/C TO SERVICE.