As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIR - FLT NR 421 - ON FIRST START ATTEMPT, ENGINE WOULD NOT LIGHT OFF. AFTER A LONG PREHEAT, THE ENGINE STARTED. MAINTENANCE INVESTIGATED AND FOUND THE WIRE TO THE PRIMARIES ONLY SOLENOID CANNON PLUG BROKEN. AFTER REPLACING THE CANNON PLUG, THE ENGINE START CYCLE WAS SATISFACTORY. (M)