As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, R DUCT LEAK LP 1 STATUS MSG. A/C RETURNED TO THE GATE (BTB) AND MTX GROUNDED A/C. MTX THEN DEFERRED LP 1 DUCT LEAK DETECTION IAW MEL 26-18-1-1-1, MX PROCEDURES C/W, MBCB 01/08/26, PLACARDS INSTALLED.AND RETURNED A/C TO SERVICE