As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TEST FLIGHT OUT OF GSO, THE LEFT AND RIGHT GEAR VISUAL DOWNLOCK INDICATORS SHOWED DOWN AND LOCKED WITH GEAR RETRACTED. RECYCLED GEAR AND HAD SAME INDICATION. REMOVED AND REINSTALLED LEFT AND RIGHT GEAR VISUAL DOWNLOCK INDICATORS IAW DC-8 MM CHAPTER 32. SYSTEM OPS CHECKED GOOD ON GEAR SWING IAW DC-8 MM CHAPTER 32.