As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 THRUST REVERSER DISAGREE MAST CAUTION DURING TAKEOFF. FEW SECONDS AFT THRUST SET LOW SPEED ABORT. CLEANED AND SECURED THE LT WOW PROXIMITY SWITCH IAW AMM 32-63-01 AND PERFORMED THRUST REVERSER OPS CHECK IAW AMM 78-30-00 NO DISCREPANCIES FOUND.