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.