Narrative:

We were settled into a cruise climb on our way up to cruising altitude. Passing through approximately FL255; we received an right rev unlocked caution message. I called for the immediate action checklist for reverser unlocked while simultaneously selecting the emergency stow for the right hand reverser. We completed the associated initial action items and QRH procedures and initially sought to divert back to departure airport. However; upon further review realized ZZZ was closer at that point and was thus a better option. We then obtained a clearance; and amendment to our release for the divert. The right rev unlocked and associated icon on the right engine N1 gauge persisted for the remainder of the flight; disappearing only upon engine shutdown at the gate. During descent; we selected the fdr event button in an effort to potentially help maintenance diagnose the issue with the airplane. We completed an uneventful; normal landing. The auto throttle retard (ATR) mechanism never actuated; this could be perhaps be due to the selection of the emergency stow switchlight. Also; the performance and handling characteristics of the aircraft were entirely normal throughout the event; along with engine indications (N1; N2; itt; etc). It was ambiguous to us as to whether the message was the result of erroneous detection of an unlock; or if the reverser had indeed unlocked. Regardless; we treated the message with its due attention. I was quite pleased with how my crew and operations handled the situation.

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Original NASA ASRS Text

Title: CRJ200 Captain experiences a R REV UNLOCK Caution message at FL255 during climb. EMER STOW is selected QRH procedures are complied with and flight diverts to nearest suitable airport. The throttle retard mechanism never actuated and no buffeting was felt during the diversion. The caution disappeared at the gate when the engine was shut down.

Narrative: We were settled into a cruise climb on our way up to cruising altitude. Passing through approximately FL255; we received an R REV UNLOCKED Caution message. I called for the Immediate Action Checklist for Reverser Unlocked while simultaneously selecting the EMER STOW for the right hand reverser. We completed the associated initial action items and QRH procedures and initially sought to divert back to departure airport. However; upon further review realized ZZZ was closer at that point and was thus a better option. We then obtained a clearance; and amendment to our release for the divert. The R REV UNLOCKED and associated icon on the right engine N1 gauge persisted for the remainder of the flight; disappearing only upon engine shutdown at the gate. During descent; we selected the FDR Event button in an effort to potentially help Maintenance diagnose the issue with the airplane. We completed an uneventful; normal landing. The Auto Throttle Retard (ATR) mechanism never actuated; this could be perhaps be due to the selection of the EMER STOW switchlight. Also; the performance and handling characteristics of the aircraft were entirely normal throughout the event; along with engine indications (N1; N2; ITT; etc). It was ambiguous to us as to whether the message was the result of erroneous detection of an unlock; or if the reverser had indeed unlocked. Regardless; we treated the message with its due attention. I was quite pleased with how my crew and Operations handled the situation.

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.