As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REJECTED T/O AT 50 KNOTS. RIGHT ENGINE EPR ROLLED BACK FROM 1.2 TO 1.1. WHILE ACCOMPLISHING AN ENGINE RUN TO TROUBLESHOOT THE PROBLEM, AT 1.1 EPR 14TH STAGE BLEED VALVE SOUNDED LIKE IT WAS OPEN. THE 14TH STAGE CONVERTER VALVE WAS REPLACED (CONVERTER VALVE IS THE CONTROLLING ITEM FOR THE BLEED VALVE).