CRJ200 flight crew in cruise had the right engine spool down accompanied with a fadec caution.

Attributes
ACN	710923
Time
Date	200609
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 36000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	Challenger CL600
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 50 flight time total : 9000 flight time type : 1000
ASRS Report	710923
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted other
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft Chart Or Publication
Primary Problem	Aircraft

Narrative:

During cruise; right engine spooled down to idle and received a right fadec caution. QRH directed bringing the power lever to idle and asked 'are engine indications normal?' I responded 'no' because I had no control of the fadec and shut the engine down. We diverted. After the event; I spoke to a mechanic about the possibility of the fadec doing something bad such as commanding full power in the landing flare. The mechanic believes that once the fadec has come to idle; it will stay there. So; in retrospect; I probably would have been better off answering; 'yes; engine indications are normal;' and leaving the engine running.

Original NASA ASRS Text

Title: CRJ200 FLT CREW IN CRUISE HAD THE R ENG SPOOL DOWN ACCOMPANIED WITH A FADEC CAUTION.

Narrative: DURING CRUISE; R ENG SPOOLED DOWN TO IDLE AND RECEIVED A R FADEC CAUTION. QRH DIRECTED BRINGING THE PWR LEVER TO IDLE AND ASKED 'ARE ENG INDICATIONS NORMAL?' I RESPONDED 'NO' BECAUSE I HAD NO CTL OF THE FADEC AND SHUT THE ENG DOWN. WE DIVERTED. AFTER THE EVENT; I SPOKE TO A MECH ABOUT THE POSSIBILITY OF THE FADEC DOING SOMETHING BAD SUCH AS COMMANDING FULL PWR IN THE LNDG FLARE. THE MECH BELIEVES THAT ONCE THE FADEC HAS COME TO IDLE; IT WILL STAY THERE. SO; IN RETROSPECT; I PROBABLY WOULD HAVE BEEN BETTER OFF ANSWERING; 'YES; ENG INDICATIONS ARE NORMAL;' AND LEAVING THE ENG RUNNING.

Data retrieved from NASA's ASRS site as of January 2009 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.