As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT ENGINE (FAILED L) RED CAS MESSAGE ILLUMINATED. LT ENGINE ROLL BACK FROM IDLE AND HAD UNCOMMANDED SHUTDOWN. REMOVED & REPLACED ENGINE BLEED VALVE IAW ALLISON/ROLLS-ROYCE MM CHAPTER 75-31-15, GROUND RUNS & OPS CHECKS GOOD.