As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER GEAR RETRACTION NOSE GEAR INDICATION WAS RED AND GREEN AT THE SAME TIME. FOUND THE LANDING GEAR POSITION SWITCH (S93) CORRODED AND HANGING UP. REMOVED AND REPLACED SWITCH AND CANNON PLUG (D300). INDICATION CHECKED GOOD PER B727, MM 32-61-71.