As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMER PRESS CAME ON DURING TAKEOFF AND WAS WITHOUT AN ANNUNCIATOR. COULD HEAR THE "RUSHING AIR" SOUND WHEN THE THROTTLES WERE POWERED UP. RAN A/C FOR 30 MINUTES AT VARIOUS POWER SETTINGS WITH PRESSURIZATION SELECTED NORMAL - SELECTED EMERGENCY SEVERAL TIMES. ALL SYSTEMS WORKED PROPERLY - NO DEFECTS NOTED. ALL WORK I/A/W CESSNA 560 M.M.