As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AS POWER WAS SET FOR T/O RT BLEED TRIP OFF LIGHT ILLUMINATED, 20 KTS ABORTED T/O. ACCOMPLISHED NNC PROCEDURE. THERE WAS A SPLIT ON LT AND RT DUCT PRESSURE. AFTER RESET, BLEED OPENED AND LT AND RT DUCT PRESSURE RETURNED TO NORMAL. REMOVED AND REPLACED PRECOOLER VALVE. RAN ENGINE PER PFHB. MSG DID NOT RETURN.