Beechjet 400 flight crew received a 'master warning' light during descent; and then a 'right thrust ...

Narrative:

During descent from cruise altitude of FL330 and through FL240; we noticed a master warning light illuminate without any associated annunciators. We continued the flight trying to figure out what was causing the master warning. Reaching 9;500 ft; we noticed a dimly illuminated 'right thrust reverser' unlock light. Upon noticing the full illumination of the light and test of the indicator lights in the cockpit; I completed the memory items for the associated malfunction and called for the checklist. While completing the checklist; the 'right thrust reverser' unlock light would not extinguish.noting that we would be executing a visual approach via a traffic pattern to the runway; I elected to follow the checklist and shut down the engine in an attempt to assure minimal effect should the reverser deploy in a more unfavorable altitude and attitude: i.e. In the traffic pattern on a turn to final within close proximity to the ground. After completion of all checklists; including the single engine approach and landing checklist; a normal approach and landing was made. The flight concluded without event.

Original NASA ASRS Text

Title: Beechjet 400 flight crew received a 'Master Warning' light during descent; and then a 'Right Thrust Reverser' unlock light. Following the checklist; the right engine was shut down as a precaution and the aircraft was landed safely.

Narrative: During descent from cruise altitude of FL330 and through FL240; we noticed a Master Warning light illuminate without any associated annunciators. We continued the flight trying to figure out what was causing the Master Warning. Reaching 9;500 FT; we noticed a dimly illuminated 'Right Thrust Reverser' Unlock light. Upon noticing the full illumination of the light and test of the indicator lights in the cockpit; I completed the memory items for the associated malfunction and called for the checklist. While completing the checklist; the 'Right Thrust Reverser' Unlock light would not extinguish.Noting that we would be executing a visual approach via a traffic pattern to the runway; I elected to follow the checklist and shut down the engine in an attempt to assure minimal effect should the reverser deploy in a more unfavorable altitude and attitude: i.e. in the traffic pattern on a turn to final within close proximity to the ground. After completion of all checklists; including the single engine approach and landing checklist; a normal approach and landing was made. The flight concluded without event.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1044146
Time
Date	201210
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Beechjet 400
Operating Under FAR Part	Part 91
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Reverser Position Indication
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Beechjet 400 flight crew received a 'master warning' light during descent; and then a 'right thrust reverser' unlock light. Following the checklist; the right engine was shut down as a precaution and the aircraft was landed safely.