As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED RECENTLY OVERHAULED VALVE FROM SUPPLY. INSTALLED VALVE, VALVE WOULD NOT PASS OPERATIONAL TEST IN AIRCRAFT. FOUND VALVE TO BE FAULTY. (INTERNALLY BYPASSING PNEUMATIC PRESSURE). PART WAS OVERHAULED 5-23-97 BY ALLIED SIGNAL AEROSPACE EQUIPMENT SYSTEMS.