Narrative:

While climbing from FL330 to FL350 with autoplt and autothrottles engaged, our aircraft encountered the wake turbulence and jet wash of another aircraft 20+ mi ahead and higher than us in trail and on the same route of flight. Very shortly after clearing the light to moderate wake turbulence we experienced an egt overtemp on the #2 engine with loss of thrust and subsequent master caution alert. The #2 engine was shut down according to the flight manual. An emergency was declared and we diverted to sacramento metropolitan airport for a normal single engine landing. I believed the problem was caused from the wake turbulence and jet wash of the preceding aircraft which caused a compressor stall on the #2 engine and subsequent egt overtemp. I was in the process of trying to maneuver clear of the flight path of the preceding aircraft when we encountered the wake turbulence. I never expected it to cause the egt overtemp of the #2 engine. I have encountered wake turbulence in this manner before and never had any significant problems. To prevent a recurrence of this situation, I will use TCASII more to see preceding in trail aircraft and ask to be vectored clear by ATC before I encounter their wake. Callback conversation with reporter revealed the following information: reporter captain confirmed the aircraft as an A319 with 2IAE-Z2522-A5 engines. Reporter believes that the wake encounter caused a compressor stall, though they didn't hear a compressor stall. But, immediately thereafter the engine egt went into the red band and the master caution light illuminated plus the engine lost thrust. The aircraft was only 2 months old and reporter was surprised that they lost the engine. They declared an emergency and diverted to smf which was only approximately 80 mi away. After landing and engine inspected it was found that the 9TH through 12TH stages of the compressor blades were destroyed. Supplemental information from acn 405443: we were climbing through FL330 when we passed through the contrail of an aircraft 20-25 mi in front of us. The ECAM system then alerted us to a #2 engine overtemp. We shut the motor down by following all displayed ECAM procedures and appropriate checklists before doing a single engine landing at smf. Overtemp was potentially caused by light to moderate turbulence caused by preceding aircraft's wake. I feel crew would have reacted quicker to situation if aircraft warning for ECAM was as loud as cabin call chime A319. Crew was forced to investigate instruments to ascertain problem.

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Original NASA ASRS Text

Title: A319 ACFT IN CRUISE CLB ENCOUNTERED WAKE TURB FROM PRECEDING ACFT 20 MI AHEAD AND ALSO IN CLB, TYPE UNKNOWN. RIGHT AFTER THE WAKE JOLT THE #2 ENG OVERTEMPED, LOST THRUST AND MASTER CAUTION LIGHT CAME ON. FLC SHUT DOWN ENG AND DIVERTED TO NEAREST ARPT.

Narrative: WHILE CLBING FROM FL330 TO FL350 WITH AUTOPLT AND AUTOTHROTTLES ENGAGED, OUR ACFT ENCOUNTERED THE WAKE TURB AND JET WASH OF ANOTHER ACFT 20+ MI AHEAD AND HIGHER THAN US IN TRAIL AND ON THE SAME RTE OF FLT. VERY SHORTLY AFTER CLRING THE LIGHT TO MODERATE WAKE TURB WE EXPERIENCED AN EGT OVERTEMP ON THE #2 ENG WITH LOSS OF THRUST AND SUBSEQUENT MASTER CAUTION ALERT. THE #2 ENG WAS SHUT DOWN ACCORDING TO THE FLT MANUAL. AN EMER WAS DECLARED AND WE DIVERTED TO SACRAMENTO METRO ARPT FOR A NORMAL SINGLE ENG LNDG. I BELIEVED THE PROB WAS CAUSED FROM THE WAKE TURB AND JET WASH OF THE PRECEDING ACFT WHICH CAUSED A COMPRESSOR STALL ON THE #2 ENG AND SUBSEQUENT EGT OVERTEMP. I WAS IN THE PROCESS OF TRYING TO MANEUVER CLR OF THE FLT PATH OF THE PRECEDING ACFT WHEN WE ENCOUNTERED THE WAKE TURB. I NEVER EXPECTED IT TO CAUSE THE EGT OVERTEMP OF THE #2 ENG. I HAVE ENCOUNTERED WAKE TURB IN THIS MANNER BEFORE AND NEVER HAD ANY SIGNIFICANT PROBS. TO PREVENT A RECURRENCE OF THIS SIT, I WILL USE TCASII MORE TO SEE PRECEDING IN TRAIL ACFT AND ASK TO BE VECTORED CLR BY ATC BEFORE I ENCOUNTER THEIR WAKE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR CAPT CONFIRMED THE ACFT AS AN A319 WITH 2IAE-Z2522-A5 ENGS. RPTR BELIEVES THAT THE WAKE ENCOUNTER CAUSED A COMPRESSOR STALL, THOUGH THEY DIDN'T HEAR A COMPRESSOR STALL. BUT, IMMEDIATELY THEREAFTER THE ENG EGT WENT INTO THE RED BAND AND THE MASTER CAUTION LIGHT ILLUMINATED PLUS THE ENG LOST THRUST. THE ACFT WAS ONLY 2 MONTHS OLD AND RPTR WAS SURPRISED THAT THEY LOST THE ENG. THEY DECLARED AN EMER AND DIVERTED TO SMF WHICH WAS ONLY APPROX 80 MI AWAY. AFTER LNDG AND ENG INSPECTED IT WAS FOUND THAT THE 9TH THROUGH 12TH STAGES OF THE COMPRESSOR BLADES WERE DESTROYED. SUPPLEMENTAL INFO FROM ACN 405443: WE WERE CLBING THROUGH FL330 WHEN WE PASSED THROUGH THE CONTRAIL OF AN ACFT 20-25 MI IN FRONT OF US. THE ECAM SYS THEN ALERTED US TO A #2 ENG OVERTEMP. WE SHUT THE MOTOR DOWN BY FOLLOWING ALL DISPLAYED ECAM PROCS AND APPROPRIATE CHKLISTS BEFORE DOING A SINGLE ENG LNDG AT SMF. OVERTEMP WAS POTENTIALLY CAUSED BY LIGHT TO MODERATE TURB CAUSED BY PRECEDING ACFT'S WAKE. I FEEL CREW WOULD HAVE REACTED QUICKER TO SIT IF ACFT WARNING FOR ECAM WAS AS LOUD AS CABIN CALL CHIME A319. CREW WAS FORCED TO INVESTIGATE INSTS TO ASCERTAIN PROB.

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.