An LJ25 in cruise flight at FL410 experienced a flameout of left engine. Crew declared emergency and...

Attributes
ACN	717058
Time
Date	200611
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 41000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc tower : zzz.tower
Operator	Other
Make Model Name	Learjet 25
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 75 flight time total : 7000 flight time type : 1000
ASRS Report	717058
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 50 flight time total : 4000 flight time type : 35
ASRS Report	717244
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

At FL410 while in a left turn; we had a flameout on the left engine on a lear 25. Therefore; we could not hold altitude. We notified center 2 times that we had a flameout and needed to descend. They would not let us descend due to traffic. Then we declared an emergency. They gave us a right turn to 270 degrees at FL350. Then we told them we needed FL250; to attempt a relight and go to ZZZ1. They then cleared us to FL250. At FL250 we got a relight. They asked us if we would like to continue the emergency. We told them no; that we had both engines back and everything was normal. They gave us a right turn direct to ZZZ1. On the ground I called our head mechanic. He had me do a static run-up according to his specifications. Everything checked out normal. He cleared us to fly. We then went back up. At about XA30 at FL410 while in another left turn; we had another flameout of the left engine. We started to lose altitude. We notified ATC who cleared us to FL350. We told them we wanted to go to ZZZ2 and FL250 to attempt a relight. They cleared us direct and FL250. At FL250 we got the relight. We continued. The next day I talked to our head mechanic again and decided the best thing to do would be to fly home at FL250 which is in the relight envelope; so that maintenance could do a more thorough check.

Original NASA ASRS Text

Title: AN LJ25 IN CRUISE FLT AT FL410 EXPERIENCED A FLAMEOUT OF L ENG. CREW DECLARED EMER AND DSNDED FOR A SUCCESSFUL RELIGHT. AFTER LNDG AND STATIC RUN-UP; THEY LATER HAD ANOTHER FLAMEOUT OF THE L ENG; AGAIN AT FL410.

Narrative: AT FL410 WHILE IN A L TURN; WE HAD A FLAMEOUT ON THE L ENG ON A LEAR 25. THEREFORE; WE COULD NOT HOLD ALT. WE NOTIFIED CTR 2 TIMES THAT WE HAD A FLAMEOUT AND NEEDED TO DSND. THEY WOULD NOT LET US DSND DUE TO TFC. THEN WE DECLARED AN EMER. THEY GAVE US A R TURN TO 270 DEGS AT FL350. THEN WE TOLD THEM WE NEEDED FL250; TO ATTEMPT A RELIGHT AND GO TO ZZZ1. THEY THEN CLRED US TO FL250. AT FL250 WE GOT A RELIGHT. THEY ASKED US IF WE WOULD LIKE TO CONTINUE THE EMER. WE TOLD THEM NO; THAT WE HAD BOTH ENGS BACK AND EVERYTHING WAS NORMAL. THEY GAVE US A R TURN DIRECT TO ZZZ1. ON THE GND I CALLED OUR HEAD MECH. HE HAD ME DO A STATIC RUN-UP ACCORDING TO HIS SPECS. EVERYTHING CHKED OUT NORMAL. HE CLRED US TO FLY. WE THEN WENT BACK UP. AT ABOUT XA30 AT FL410 WHILE IN ANOTHER L TURN; WE HAD ANOTHER FLAMEOUT OF THE L ENG. WE STARTED TO LOSE ALT. WE NOTIFIED ATC WHO CLRED US TO FL350. WE TOLD THEM WE WANTED TO GO TO ZZZ2 AND FL250 TO ATTEMPT A RELIGHT. THEY CLRED US DIRECT AND FL250. AT FL250 WE GOT THE RELIGHT. WE CONTINUED. THE NEXT DAY I TALKED TO OUR HEAD MECH AGAIN AND DECIDED THE BEST THING TO DO WOULD BE TO FLY HOME AT FL250 WHICH IS IN THE RELIGHT ENVELOPE; SO THAT MAINT COULD DO A MORE THOROUGH CHK.

Data retrieved from NASA's ASRS site as of January 2009 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.

An LJ25 in cruise flight at FL410 experienced a flameout of left engine. Crew declared emergency and descended for a successful relight. After landing and static run-up; they later had another flameout of the left engine; again at FL410.