Falcon 7X
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 41; Flight Crew Total 10600; Flight Crew Type 2200
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Aircraft Equipment Problem Dissipated; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Returned To Clearance
Aircraft
After two hours of flight from ZZZ departure with ZZZ1 as destination; there was a big cell In front of us; because of that; we decided to climb to 46;000 feet; requesting block altitud 45;000-47;000 [feet]. The aircraft was a little bit heavy to climb to FL470 with a ceiling of 47100 at Mach .83; that is why we went for 46;000 feet. After a couple of minutes at 46;000 [feet] we felt something similar to turbulence but it wasn't; it was the engine 2 with apparent compressor stall; consequently we've got the engine 2 out on the CAS messages; started the check list and requested lower altitude at the same time; then on the way to FL450; the engine auto relighted; we checked all the parameters on the engine and everything was normal; after that we kept FL450 all the way to destination without any other problem.
We were cruising at FL450; the weather was getting bad; we were in IMC conditions and light turbulence; the plane was a little heavy to climb to FL470 to try to go out of the clouds; so we requested a block altitud between FL450 and FL470; we got approved as requested; so we climbed to FL460. After cruising for about 10 min; we felt some vibration; we thought it was the turbulence; but after the third time; we noticed the engine number 2 N1 and N2 were dropping; a couple of seconds later we received a CAS message 'Engine #2 Out'; we started the check list and requested descend to FL450; in the mean time the engine was trying to auto relight; we went to idle on that one and by the time we were reaching FL450; the engine started by itself; so we leveled off; waited a little bit to let it stabilize and added some power to make sure everything was fine; we finished the check list and everything looked normal; so we continue the flight with no other issues.
Falcon 7X flight crew reported engine failure shortly after climb to an altitude too high for the environmental condition needed for the aircraft's heavy weight.