Narrative:

Inbound via the STAR over ZZZ VORTAC talking with center; level at FL290; descent to cross ZZZ2 at 14000 ft; the first officer started the descent versus 2000 ft and thrust idle. We noticed the left engine at 80.5% N1; itt 660 degrees C; 87.7% N2. We talked to maintenance and dispatch and ourselves; and discussed the situation. At first they wanted us to fly an approach in but wanted more time to discuss our situation. I declared an emergency when we contacted approach. After being vectored we eventually were vectored to ZZZ3 to enter a hold; which we did. We talked to maintenance who wanted us to try abnormal thrust lever jammed checklist. The first officer and I thought abnormal single engine would be worth a try. After a while; maintenance agreed to single engine and if that failed we would use thrust lever jammed checklist procedure. Single engle did not work; so we started thrust lever jammed; which did work. We were then being vectored around to shoot a runway 27 ILS approach single engine. The first officer was flying and used the autoplt and made a perfect single engine landing and we taxied off the runway and taxied to the gate for deplaning. Given the situation; I feel we did a pretty good job of it with the workload situation. I tried to cover all my bases with maintenance; dispatch; ATC; flight attendant and the first officer. This event was a mechanical failure we feel with the ecu but maintenance will find out. Supplemental information from acn 685578: after a brief discussion; we agreed to declare an emergency. The captain; in coordination with maintenance and myself; performed the QRH and we finally were able to secure the engine and landed safely on runway 27.

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Original NASA ASRS Text

Title: CRJ-100 FLT CREW HAS A MALFUNCTION WITH THE L ENG DURING AN ILS APCH; DECLARES AN EMER; REQUESTS HOLDING; SECURES THE ENG; AND FLIES AN UNEVENTFUL APCH AND LNDG.

Narrative: INBOUND VIA THE STAR OVER ZZZ VORTAC TALKING WITH CTR; LEVEL AT FL290; DSCNT TO CROSS ZZZ2 AT 14000 FT; THE FO STARTED THE DSCNT VERSUS 2000 FT AND THRUST IDLE. WE NOTICED THE L ENG AT 80.5% N1; ITT 660 DEGS C; 87.7% N2. WE TALKED TO MAINT AND DISPATCH AND OURSELVES; AND DISCUSSED THE SITUATION. AT FIRST THEY WANTED US TO FLY AN APCH IN BUT WANTED MORE TIME TO DISCUSS OUR SITUATION. I DECLARED AN EMER WHEN WE CONTACTED APCH. AFTER BEING VECTORED WE EVENTUALLY WERE VECTORED TO ZZZ3 TO ENTER A HOLD; WHICH WE DID. WE TALKED TO MAINT WHO WANTED US TO TRY ABNORMAL THRUST LEVER JAMMED CHKLIST. THE FO AND I THOUGHT ABNORMAL SINGLE ENG WOULD BE WORTH A TRY. AFTER A WHILE; MAINT AGREED TO SINGLE ENG AND IF THAT FAILED WE WOULD USE THRUST LEVER JAMMED CHKLIST PROC. SINGLE ENGLE DID NOT WORK; SO WE STARTED THRUST LEVER JAMMED; WHICH DID WORK. WE WERE THEN BEING VECTORED AROUND TO SHOOT A RWY 27 ILS APCH SINGLE ENG. THE FO WAS FLYING AND USED THE AUTOPLT AND MADE A PERFECT SINGLE ENG LNDG AND WE TAXIED OFF THE RWY AND TAXIED TO THE GATE FOR DEPLANING. GIVEN THE SITUATION; I FEEL WE DID A PRETTY GOOD JOB OF IT WITH THE WORKLOAD SITUATION. I TRIED TO COVER ALL MY BASES WITH MAINT; DISPATCH; ATC; FLT ATTENDANT AND THE FO. THIS EVENT WAS A MECHANICAL FAILURE WE FEEL WITH THE ECU BUT MAINT WILL FIND OUT. SUPPLEMENTAL INFO FROM ACN 685578: AFTER A BRIEF DISCUSSION; WE AGREED TO DECLARE AN EMER. THE CAPT; IN COORD WITH MAINT AND MYSELF; PERFORMED THE QRH AND WE FINALLY WERE ABLE TO SECURE THE ENG AND LANDED SAFELY ON RWY 27.

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.