As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DAY - DURING TAKEOFF ROLL WITH POWER SET, LARGE BANG AND FIREBALL WAS OBSERVED ON RIGHT SIDE OF THE AIRCRAFT. RETURNED TO RAMP. INSPECTED NR 3 AND NR 4 ENGINES FOR DAMAGE. NONE FOUND. COULD NOT DUPLICATE ON GROUND RUN. SUBMITTER STATES, SUSPECT MOMENTARY STUCK INTERSTAGE AIR BLEED VALVE. (M)