As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PERFORMED THE FIRE, OVERHEAT TEST. THE TEST FAILED. ALL MN DECK DETECTORS FAILED. TROUBLESHOT AND FOUND ON FIRE TEST SWITCH ON THE OVERHEAD PANEL M7317 HAD ONE PIN NOT CONNECTED. R & R THE SWITCHING MODULE M7317 IAW AMM 26-10-02-4, REV 89.00. OPS CHECKED GOOD.