As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF FROM TUS. FLIGHT CONTINUED TO PHX AND LANDED WITHOUT INCIDENT. EMERGENCY EQUIPMENT WAS CALLED OUT ON STANDBY AS A PRECAUTION. FOUND NOSE STRUT UNDERSERVICED, SERVICED STRUT TO PROPER LEVELS. OPERATIONAL CHECK OK ON GEAR SWING. AIRCRAFT RETURNED TO SERVICE.