As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2259 NR 1 AND NR 2 ENGINE MANUAL CAUTION LIGHT ILLUMINATED DURING TAXI OUT. MAINTENANCE COMPLIED WITH RESET AND OPERATIONAL CHECK OF BETA LOCKOUT SYSTEM IAW MCN NR 27631-01. OPERATIONAL CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.