As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE CLIMB AT 23,000 I STARTED TO FEEL THE AFFECTS OF HYPOXIA WITH NO CABIN ALTITUDE WARNING. AFTER EMERGENCY DESCENT TO 10,000 I NOTED THE CABIN PRESSURE AT 0. CORRECTIVE ACTION: R&R THE N2123 PCB AND RECTIFIED STATIC LEAK TO THE OUTFLOW VALVES REF CE525B MM 24-60-02 AND 21-31-00.