Narrative:

Flight was normal until my copilot and I made our initial descent for landing into beaumont. After making a descent at flight idle I was in the process of adding power to both engines when I noticed a yaw. I glanced down at the engine instruments to find the right engine still at approximately 58% ni. About 5-7 seconds after the left engine spooled the right engine then came up to speed. I, of course, know that this situation is abnormal. I told my copilot that 'when we get to beaumont, let's have maintenance take a look to see what's wrong.' we did not experience any more problems after the initial problem until slowing for the approach, gear down, flaps takeoff, approximately 6-7 mi out. I added power to both engines to stabilize the speed at 130 KTS, when I noticed again the right engine not spooling up. Since the right engine was maintaining minimum 58% I elected to feather the right propeller instead of shutting down the engine completely, since we were inside of the marker I elected to declare an emergency and make the landing, then advise ATC on the ground of the situation which I did. After arriving at the gate, I advised maintenance on the company radio of the situation. They in turn told me they would meet me at the gate which they did. After deplaning the passenger, the mechanic and I then taxied the airplane to maintenance and attempted to recreate the problem with the right engine again which we did successfully except the difference being the engine would only spool to approximately 35-40% ni on the start and that's all. We then shut the engine down and I then asked the mechanic, 'do you want me to write this up on the form 1?' he said, 'no, I'll make the appropriate entry in the log form.'

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Original NASA ASRS Text

Title: ACR LTT ENGINE FAILURE IN FLT. FAILURE NOT ENTERED IN ACFT LOG BOOK.

Narrative: FLT WAS NORMAL UNTIL MY COPLT AND I MADE OUR INITIAL DSCNT FOR LNDG INTO BEAUMONT. AFTER MAKING A DSCNT AT FLT IDLE I WAS IN THE PROCESS OF ADDING PWR TO BOTH ENGS WHEN I NOTICED A YAW. I GLANCED DOWN AT THE ENG INSTRUMENTS TO FIND THE RIGHT ENG STILL AT APPROX 58% NI. ABOUT 5-7 SECS AFTER THE LEFT ENG SPOOLED THE RIGHT ENG THEN CAME UP TO SPD. I, OF COURSE, KNOW THAT THIS SITUATION IS ABNORMAL. I TOLD MY COPLT THAT 'WHEN WE GET TO BEAUMONT, LET'S HAVE MAINT TAKE A LOOK TO SEE WHAT'S WRONG.' WE DID NOT EXPERIENCE ANY MORE PROBS AFTER THE INITIAL PROB UNTIL SLOWING FOR THE APCH, GEAR DOWN, FLAPS TKOF, APPROX 6-7 MI OUT. I ADDED PWR TO BOTH ENGS TO STABILIZE THE SPD AT 130 KTS, WHEN I NOTICED AGAIN THE RIGHT ENG NOT SPOOLING UP. SINCE THE RIGHT ENG WAS MAINTAINING MINIMUM 58% I ELECTED TO FEATHER THE RIGHT PROP INSTEAD OF SHUTTING DOWN THE ENG COMPLETELY, SINCE WE WERE INSIDE OF THE MARKER I ELECTED TO DECLARE AN EMER AND MAKE THE LNDG, THEN ADVISE ATC ON THE GND OF THE SITUATION WHICH I DID. AFTER ARRIVING AT THE GATE, I ADVISED MAINT ON THE COMPANY RADIO OF THE SITUATION. THEY IN TURN TOLD ME THEY WOULD MEET ME AT THE GATE WHICH THEY DID. AFTER DEPLANING THE PAX, THE MECH AND I THEN TAXIED THE AIRPLANE TO MAINT AND ATTEMPTED TO RECREATE THE PROB WITH THE RIGHT ENG AGAIN WHICH WE DID SUCCESSFULLY EXCEPT THE DIFFERENCE BEING THE ENG WOULD ONLY SPOOL TO APPROX 35-40% NI ON THE START AND THAT'S ALL. WE THEN SHUT THE ENG DOWN AND I THEN ASKED THE MECH, 'DO YOU WANT ME TO WRITE THIS UP ON THE FORM 1?' HE SAID, 'NO, I'LL MAKE THE APPROPRIATE ENTRY IN THE LOG FORM.'

Data retrieved from NASA's ASRS site as of August 2007 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.