As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI - FLIGHT 2403 AFTER TAKEOFF NOSE GEAR UNSAFE LIGHT REMAINED ILLUMINATED, AFTER NORMAL RETRACTION OF NLG LOUD BANGING HEARD FROM UNDER COCKPIT FLOOR. PERFORMED EMERGENCY EXTENSION, RTF UNEVENTFUL LANDING. FERRY FLIGHT TO PDX FOR MAINTENANCE. PDX MAINTENANCE REPLACED NOSE LANDING GEAR SOLENOID SEQUENCE VALVE, PERFORMED LANDING GEAR PRIMARY EXTENSION AND RETRACTION SYSTEM FUNCTIONAL TEST. OPS CHECKS GOOD, AIRCRAFT RETURNED TO SERVICE.