As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)TIME SINCE OVERHAUL, 0.7 HOURS. BLEED VALVE FUNCTIONED CORRECTLY ON TEST FLIGHT BUT PART WAY THROUGH NEXT FLIGHT, BLEED VALVE WOULD NO LONGER CLOSE. TACH BOX REMOVED, LOOSE PARTS FOUND INSIDE. ASSEMBLY REPLACED. AIRCRAFT RETURNED TO SERVICE.