As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR (BUMPS) IN CRUISE FLIGHT INTERMITTENTLY. NO GEAR UNSAFE LIGHT DURING BUMP. TROUBLESHOT DISCREPANCY TO INTERNAL LEAKAGE OF TIRE LANDING GEAR CONTROL MANIFOLD. REMOVED DEFECTIVE MANIFOLD. INSTALLED A MODIFIED MANIFOLD. OPS CHECK AND LEAK CHECK OF MANIFOLD ARE GOOD. PERFORMED GEAR SWINGS AND BLEED PROCEDURES IAW MM.