Narrative:

During our final descend after completion of the descent checklist; we noticed on radar some weather along the approach end. Shortly after we asked approach control for radar vectors around the weather. While navigating around different pockets of weather with cont ignition on; we noticed some clear areas with very little to no turbulence in and out of the weather. During the final stages of the approach we discussed go-around procedures for possible windshear and/or the field not coming into view. The field along with the runway came into view around the FAF even though it was light/moderate rain at the runway. Upon touching down at about 1;000-1;300 feet the thrust reversers would not unlock. I kept the speed from FAF to the runway at the top of the speed bug. Reference speed was 139 kts. We never saw any speed fluctuations at any time during the approach. I applied maximum braking all while notifying the captain of the thrust reversers being locked still; in which he tried to unlock with no such luck. As we were racing down the runway while both myself and the captain applying maximum braking; we decided to veer to the left in order to avoid going off the end of the runway which ends in a steep ditch. We veered to the left around a taxiway and went into the grass/mud which helped bring aircraft to a stop. We quickly notified tower of the accident and when airport fire and rescue showed up we open main cabin door to access the situation.

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Original NASA ASRS Text

Title: CRJ-900 flight crew reported the failure of the thrust reversers upon landing roll out and degraded braking resulting in a runway excursion.

Narrative: During our final descend after completion of the descent checklist; we noticed on radar some weather along the approach end. Shortly after we asked approach control for radar vectors around the weather. While navigating around different pockets of weather with cont ignition on; we noticed some clear areas with very little to no turbulence in and out of the weather. During the final stages of the approach we discussed go-around procedures for possible windshear and/or the field not coming into view. The field along with the runway came into view around the FAF even though it was light/moderate rain at the runway. Upon touching down at about 1;000-1;300 feet the thrust reversers would not unlock. I kept the speed from FAF to the runway at the top of the speed bug. REF speed was 139 kts. We never saw any speed fluctuations at any time during the approach. I applied maximum braking all while notifying the captain of the thrust reversers being locked still; in which he tried to unlock with no such luck. As we were racing down the runway while both myself and the captain applying maximum braking; we decided to veer to the left in order to avoid going off the end of the runway which ends in a steep ditch. We veered to the left around a taxiway and went into the grass/mud which helped bring aircraft to a stop. We quickly notified tower of the accident and when airport fire and rescue showed up we open main cabin door to access the situation.

Data retrieved from NASA's ASRS site 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.