As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED NORMAL LANDING GEAR INOP FOR EXTENSION, USED BOTTLE. CREW REPORTED WHEN THE GEAR HANDLE WAS SELECTED DOWN, THERE WAS NO RESPONSE, NO NOISES - NOTHING. TROUBLESHOOTING REVEALED SOLENOID -B- OF LANDING GEAR SELECTOR/DUMP VALVE READ OPEN ON CONTINUITY CHECK. REPLACED LANDING GEAR SELECTOR/DUMP VALVE. OPERATIONALLY TESTED OKAY. AIRCRAFT RETURNED TO SERVICE.