As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, UPON GEAR RETRACTION, RECEIVED A GEAR DISAGREE WARNING WITH A LIGHT AERODYNAMIC BUFFET. RETURNED TO SLC. FOUND MLG NOT UPLOCKING ON UPLOCK HOOKS. REMOVED AND REPLACED MLG SELECTOR VALVE IAW MM 32-32-00. SWUNG GEAR. OPS CHECKS GOOD & LEAK CHECKS GOOD.