As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ENG 1 START THE ENG 1 ING A FAULT APPEAR. THE FADEC MADE A NEW ENG START WITH IGN AB WITHOUT POSITIVE SUCCESS, ENG REMAIN HUNG STAR. IAW AMM 73-21-60-000 400-001-B THE ECU ON ENG 1 WAS R & R. THE FUNCTIONAL TEST OF THE ECU WAS SATISFACTORY PN 2123M56P01, SN OFF LMDN3170 & SN ON LMDB4420.