What was found
LEFT REVERSER UNLOCKED DURING TAKEOFF AT 50 KNOTS. REJECTED TAKEOFF & AFTER SEVERAL MINUTES REVERSER LIGHT WENT OUT. RELEASED FOR SERVICE IAW MEL: 78-31-01-01 R& R LT ENGINE RT ACTUATOR PROXIMITY SENSOR S165 IAW AMM 78-36-01-4, REACTIVATED LT THRUST REVERSER & PERFORMED OPS CHECK OF LT THRUST REVERSER IAW AMM 78-31-00-5. ALL INDICATIONS NORMAL. R & R PROXIMITY SWITCH ELECTRONICS UNIT IAW AMM 32-09-04-4. OPS CHECKS GOOD. PERFORMED TAXI CHECK AND OPS CHECK OF LT THRUST REVERSER. DURING TAXI CHECK ALL INDICATION SATISFACTORY, NO AMBER REVERSER INDICATION. TOOK ENGINE TO POWER & NO AMBER REVERSER INDICATION. OPERATED THRUST REVERSER SEVERAL TIMES WITH NORMAL RESULTS.