As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE UNSCREWING NUT ON STEM, STEM UNSCREWED FROM DIAPHRAGM INDICATING STEM WAS LOOSELY ATTACHED TO DIAPHRAGM SINCE MANUFACTURE. SUBMITTER STATED IF STEM SEPARATED DURING ENGINE OPERATION, THE ENGINE WOULD STOP RUNNING WITHOUT WARNING.