As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GPWS SYSTEM INOPERATIVE. TERRAIN WON`T SINK AND PULL UP CALLS MADE. AIRCRAFT WAS IN NORMAL TAKEOFF CONFIGURATION IN CLIMB. MADE TURNBACK TO PSM SYSTEM DEFERRED PER MEL. SYSTEM LATER TROUBLESHOT AND REPLACED GPWS CPU SYSTEM TESTS NORMAL ON THE DECK AT THIS TIME.