B757-200
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance
Flight Crew Diverted; Flight Crew Landed As Precaution; General Maintenance Action
Aircraft; Human Factors; MEL; Procedure
During Preflight we noted that the Left Thrust Reverser was MEL INOP. White Placard in Logbook and sign off. We noted the MEL and sign off. We took off to ZZZ enroute we got a ACARS Message to divert right to ZZZ1 that the lockout on the left TR was not done correctly inflight deployment could occur we got direct to ZZZ1 and Landed. Gave plane to Maintenance.Plane had flown for a few days and somehow someone figured out that the Lock was not done correctly. Flight crew followed MEL and it was good to them. Make sure job is done right the first time.
[Report narrative contained no additional information.]
B757 flight crew reported a thrust reverser was not deactivated properly.