As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLESHOOTING FOLLOWING PTU TEST FIRE, THE PTU CONTROL VALUE AS FOUND FAILED IN CLOSED POSITION WITH 28 VDC ON PIN: 2 OF VALVE CONNECTOR. AN INVESTIGATION REVEALED WIRES WERE CROSSED AT MFG. WIRING REMADE IAW WDM2911 AND NEW VALVE FIT. (SW15200606366) (K)