As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - AFTER ADDING POWER FOR TAKEOFF JUST OVER THE GATE STICK PUSHER CAUTION LIGHT AND GPWS CAUTION LIGHTS ILLUMINATED ABORTED TAKEOFF AND RETURNED TO GATE. FIRST OFFICER RAD ALT TURNED RED FROM 0 TO RED RA. PLACED THE RADIO ALTIMETER ON MEL 34-40-6. RETURNED TO SERVICE. REPLACED THE NR 2 RAD ALT R/T. OPERATIONAL CHECKS GOOD.