What was found
AT FL 23 0 'CABIN ALT' RAN AWAY QUICKLY FROM 4000 TO 10000 FT, CONDUCTED EMERGENCY DESCENT. ASSOCIATED CABIN IN FLOW LOW ALERT. TROUBLESHOT PER FIM 21-30, TASK CARD 802, 803. RAN NR 1, NR 2 ENGINES AND PRESSURIZED AIRCRAFT WITH RIGHT PACK, AND LOOKED, LISTENED FOR LEAKS IN AFT ACCESSORY COMPARTMENT AND CHECKED LEFT PACK CONDITIONED AIR CHECK VALVE AND COLD AIR CHECK VALVE. ALL CHECKS GOOD, NO DEFECTS NOTED. AIRCRAFT GOOD FOR SERVICE.