As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENG REVERSER UNLOCK LIGHT AT T/O PWR. REJECTED T/O RETURN TO GATE. THRUST REVERSER NR 1 DEFER PER MEL 78-1 AND DEACTIVATED IN FWD THRUST POS. T/S FOUND UNLOCK SWITCH LOOSE AT LT SIDE. ADJUSTED AND RESECURED UNLOCK SWITCH. REACTIVATED PER MM 78-31-01. OPS CK NR 1 ENG T/REV USING APU AIR AND HOSE, FOUND T/REV OPER NORM AND ALL IND NORM.