As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR WOULD NOT RETRACT ON RETRACTION SEQUENCE AND RED NOSE GEAR LIGHTS WITH FLUTTER FROM NOSE GEAR. EXTENDED GEAR AND ALL LIGHTS GOOD. RETRACTED AGAIN SAME. NOSE GEAR RETRACTED 1 1/2 MINUTES AFTER SELECTIONS. RETURNED TO FAT. REMOVED AND REPLACED NLG MAIN ACTUATOR. OPS CHECKS GOOD.