BEECHJET 400 FLT CREW REPORTS ENGINE ROLL BACK DURING DESCENT. ENGINE IS SHUT DOWN AND RESTARTED WITH NO FURTHER PROBLEMS.

Narrative

FLYING ON TOP OF WX WITH ENG DEICE SYS ACTIVATED. AS WE BEGAN DSCNT TO FL240; THE R ENG SPOOLED DOWN. WHILE COMPLETING THE FLT CHKLIST; THE ENG OIL PRESSURE LIGHT ILLUMINATED. THE ENG SHUT DOWN; RESTART CHKLIST WAS COMPLETED; AND THE ENG RELIT SUCCESSFULLY. NO OTHER PROBS WERE ENCOUNTERED; AND A NORMAL LNDG WAS MADE AT ZZZ. MECHS WERE SUMMONED TO INVESTIGATE THE ENG. FUEL SAMPLES WERE NORMAL WITH NO WATER PRESENT; AND THE ANTI-ICING ADDITIVE WAS NORMAL. AFTER COMPLETING THE PWR CHKS; THE ACFT MANUFACTURER WAS NOTIFIED. WE ARE STILL INVESTIGATING THE CAUSE; AND AT THIS TIME; WE BELIEVE THE PROB LIES WITHIN THE P3 LINE. IT IS MY UNDERSTANDING THAT THIS SITUATION HAS OCCURRED WITH OTHER ACFT IN THE PAST; AND A SVC BULLETIN IS BEING ISSUED TO HEAT THE P3 LINE WITH ENG BLEED AIR. WE WILL CERTAINLY COMPLY WITH THIS BULLETIN IN A TIMELY MANNER IN HOPES THAT THIS OCCURRENCE WILL NOT RECUR. SUPPLEMENTAL INFO FROM ACN 789496: WE WERE DSNDING ON THE ARR OUT OF FL350 WITH THE ENG ANTI-ICE ON; WHEN THE PIC INSTRUCTED ME TO TURN ON THE WING HEAT. SHORTLY AFTER TURNING ON THE WING HEAT; THE R ENG ROLLED BACK. THE PIC INSTRUCTED ME TO ADVISE ATC THAT OUR R ENG HAD ROLLED BACK AND GET THE CHKLIST OUT FOR ENG FAILURE; AND WHILE I WAS LOOKING UP THE ENG FAILURE PROCS THE PIC STATED THE ENG FAILED AND HE SELECTED FUEL CUTOFF POS FOR THE R ENG. AT THAT TIME HE INSTRUCTED ME TO FIND THE ENG AIR-START PROCS. I INITIATED THE RESTART AND THE ENG RESTARTED AND RAN NORMAL AND LANDED WITHOUT FURTHER ABNORMALITIES. AFTER ADVISING THE MAINT DEPT AND THEIR RESEARCH THE PROBABLE CAUSE WAS P3 BLEED LINE FREEZING AND CAUSING THE ENG TO GO TO IDLE POS. I THINK HAD THE PIC WAITED JUST A LITTLE BIT THAT THE CTL OF THE ENG WOULD HAVE RETURNED TO NORMAL. I ALSO THINK THAT CRM WAS NOT USED EFFECTIVELY BECAUSE HE DECIDED TO SHUT DOWN THE ENG SO RAPIDLY AND NOT EVEN CONFER WITH ME; WHILE I WAS BUSY WITH THE CHKLIST THAT JUST THAT AMOUNT OF TIME MIGHT HAVE BEEN ENOUGH TO REGAIN CTL OF THE ENG.