As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL THE LT ENG EPR STAGNATED AT 1.64 - 1.68, LAGGING BEHIND THE RT ENG. TAKEOFF ABORTED AT APPROX 70 KNOTS. REMOVED AND REPLACED ENGINE PRESSURE RATIO INDICATOR IAW AMM 77-10-00 AND ENGINE PRESSURE RATIO TRANSMITTER IAW AMM 77-11-02. OPERATIONAL CHECK GOOD. AIRCRAFT WAS GROUNDED.