What was found
AIRCRAFT WAS GROUNDED: DURING DESCENT BOTH SIDES " STD " AT FL 240--FLASHING--AT 16000FT. CABIN PRESSURE LOST ON SYSTEM 2. CABIN DUMPED. NO MASKS DEPLOYED. REDUCED V/S ON LANDING. SYSTEM SWITCHED TO SYSTEM 1. TROUBLESHOT TO BAD RELAY 10WR , REPLACED RELAY (AALA202105259006). ACCOMPLISHED FUNCTIONAL TEST OF THE PASSENGER EMERGENCY OXYGEN SYSTEM. SYSTEM TEST CHECKED GOOD PER AMM 35-23-00-720-002. REMOVED AND REPLACED CABIN PRESSURE CONTROLLERS 1 (AALA202105279021) AND 2 (AALA202105279022) PER AMM 21-31-34. OPS CK GOOD PER AMM 21-31-00.