Narrative:

Upon landing in ZZZ during the rollout; we received a left reverser unlocked caution message. We performed the QRH; confirmed the thrust lever was at idle; and hit the emergency stow button which was illuminated. The left reverser was actually unlocked and we could not advance the left thrust lever. We called maintenance to confirm we should shut the engine down with the reverser actually unlocked at the gate upon arrival. Contract maintenance came out; made us deploy and stow the left reverser 3 times; and [signed-off as] reverser operational checked 'ok;' and returned aircraft to service. I filled out this report because I have never had a reverser actually unlock during any flight phase. As a crew; after consulting our company and each other; we made a personal decision to not continue in this aircraft.

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Original NASA ASRS Text

Title: A CRJ-200 crew received a L Reverser Unlocked caution message during the landing rollout. The Captain had never before experienced a Reverser Unlocked caution message during any phase of flight.

Narrative: Upon landing in ZZZ during the rollout; we received a L Reverser Unlocked caution message. We performed the QRH; confirmed the thrust lever was at idle; and hit the emergency stow button which was illuminated. The left reverser was ACTUALLY unlocked and we could not advance the left thrust lever. We called Maintenance to confirm we should shut the engine down with the reverser ACTUALLY unlocked at the gate upon arrival. Contract Maintenance came out; made us deploy and stow the left reverser 3 times; and [signed-off as] reverser operational checked 'OK;' and returned aircraft to service. I filled out this report because I have never had a Reverser actually unlock during any flight phase. As a crew; after consulting our Company and each other; we made a personal decision to not continue in this aircraft.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.