As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR CYCLED IN FLIGHT AT FL 430 AND FL120 UNLOCK LIGHT ILLUMINATED THEN WENT OUT AFTER 1 MINUTE. TROUBLESHOT TO FAULTY LANDING GEAR HYDRAULIC MANIFOLD ASSEMBLY. REMOVED AND REPLACED HYDRAULIC MANIFOLD. BLED SYSTEM, OPS AND LEAK CHECKS GOOD, ALL WORK DONE IAW CESSNA750 MM CHAPTER 32-30-02.