What was found
UPON GEAR RETRACTION ALL THE PRIMARY GEAR AND SECONDARY LIGHTS ILLUMINATED WITH THE GEAR HANDLE UP. FOLLOWED QRH PROCEDURES AND THE GEAR RETRACTED. TROUBLESHOOT IAW FIM 32-30-00-2, PIN A AND B, DID NOT READ CONTINUITY ON SW S1-392. REMOVED AND REPLACED LANDING GEAR FREE FALL SW IAW MM 32-61-04. WITH GEAR PINS INSTALLED, PLACED GEAR HANDLE IN UP POSITION, ALL INDICATIONS ARE NORMAL. SWITCH SW S1-392 P/N H20-24B.