As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: TWENTY MINUTES AFTER TAKEOFF CLIMBING THROUGH FL 340, TERR FAIL ANNUNCIATED IN CAPTAINS AND FIRST OFFICERS NAV DISPLAYS. GPWS INOPERATIVE ANNUNCIATOR ALSO ILLUMINATED. REMAINED ILLUMINATED THROUGHOUT FLIGHT. REPLACED GROUND PROXIMITY WARNING COMPUTER AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK, PER AMM 34-46-01.