As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING START NO START VALVE INDICATION ON NR 1 ENG. STARTER OPERATES NORMALLY. AT DP1202 PIN 5 FOUND NO GROUND PRESENT. CLEANED CONTACTS ON CONNECTORS D30434 & DP1234 AT FIREWALL. THIS RESTORED THE GROUND AT PIN 5 OF VALVE CONNECTOR. DRY MOTORED ENGINE. VALVE OPEN INDICATES GOOD. REF TASK 71 00 00 700 809 F00.