As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAULT WARNING A RIGHT PRSOV VALVE OPEN SIGNAL WAS NOT DETECTED. THE PRSOV OPEN POSITION SWITCH HAS FAILED IN THE VALVE NOT OPEN POS. THE VALVE IS NORMALLY EXPECTED TO BE OPEN WHEN THE ENGINE IS RUNNING AT MIN IDLE THROTTLE SETTING AND THE BLEED VALVE IS SWITCHED. REMOVED AND REPLACED VALVE ASSEMBLY PRESSURE REGULATION, IAW AMM 36-11-09. PENDING FOR LEAK CHECK. PERFORMED OP/LEAK CHECK, IAW 767 AMM 36-11-09. OPERATIONS CHECK FOUND NORMAL, NO LEAKS NOTED.