Narrative:

We were cleared for the visual to runway 24 in ZZZ on sun jan around xa:00 pm and the first officer started to reduce power and the torque was reduced below 2500 pounds of torque the right engine started to have compressor stalls. The first officer then stated to me that there was a flame coming out of the exhaust stack and wanted to shut the engine down at that moment. I told the first officer to bring the power up and there was no indications of a fire in the cockpit. I informed tower we were having a problem and might need assistance. The first officer and I tried to troubleshoot the problem along with getting in touch with the company. I was unable to contact the company and at that point the first officer and I decided to shut down the #2 engine and I then briefed the passengers about what was going on. We reviewed the memory items before we shut it down and then proceeded with the memory items and then followed the checklist for that emergency procedure. Tower had called crash fire rescue equipment and we then landed without incident and taxied to the gate. I then called company to inform them about the incident. There was no damage to any persons or property and the CRM was very good between myself and the first officer. Callback conversation with reporter revealed the following information: the reporter stated maintenance discovered the #2 engine pt 2 valve was stuck closed. The reporter said the function of this valve is when the engine power is reduced this valve opens to unload the compressor. The reporter stated the engine was a pratt and whitney PT6A-67D and the valve had been installed on a recent maintenance check and operated normally during the early flts.

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Original NASA ASRS Text

Title: A BEECH 1900 ON APCH DECLARED AN EMER DUE TO A #2 ENG COMPRESSOR STALL WHEN REDUCING POWER. ENG SHUTDOWN IN FLT.

Narrative: WE WERE CLRED FOR THE VISUAL TO RWY 24 IN ZZZ ON SUN JAN AROUND XA:00 PM AND THE FO STARTED TO REDUCE POWER AND THE TORQUE WAS REDUCED BELOW 2500 LBS OF TORQUE THE R ENG STARTED TO HAVE COMPRESSOR STALLS. THE FO THEN STATED TO ME THAT THERE WAS A FLAME COMING OUT OF THE EXHAUST STACK AND WANTED TO SHUT THE ENG DOWN AT THAT MOMENT. I TOLD THE FO TO BRING THE POWER UP AND THERE WAS NO INDICATIONS OF A FIRE IN THE COCKPIT. I INFORMED TOWER WE WERE HAVING A PROB AND MIGHT NEED ASSISTANCE. THE FO AND I TRIED TO TROUBLESHOOT THE PROB ALONG WITH GETTING IN TOUCH WITH THE COMPANY. I WAS UNABLE TO CONTACT THE COMPANY AND AT THAT POINT THE FO AND I DECIDED TO SHUT DOWN THE #2 ENG AND I THEN BRIEFED THE PASSENGERS ABOUT WHAT WAS GOING ON. WE REVIEWED THE MEMORY ITEMS BEFORE WE SHUT IT DOWN AND THEN PROCEEDED WITH THE MEMORY ITEMS AND THEN FOLLOWED THE CHKLIST FOR THAT EMER PROC. TWR HAD CALLED CFR AND WE THEN LANDED WITHOUT INCIDENT AND TAXIED TO THE GATE. I THEN CALLED COMPANY TO INFORM THEM ABOUT THE INCIDENT. THERE WAS NO DAMAGE TO ANY PERSONS OR PROPERTY AND THE CRM WAS VERY GOOD BTWN MYSELF AND THE FO. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED MAINT DISCOVERED THE #2 ENG PT 2 VALVE WAS STUCK CLOSED. THE RPTR SAID THE FUNCTION OF THIS VALVE IS WHEN THE ENG POWER IS REDUCED THIS VALVE OPENS TO UNLOAD THE COMPRESSOR. THE RPTR STATED THE ENG WAS A PRATT AND WHITNEY PT6A-67D AND THE VALVE HAD BEEN INSTALLED ON A RECENT MAINT CHK AND OPERATED NORMALLY DURING THE EARLY FLTS.

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