As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER APPLYING POWER TO AIRCRAFT FOR FIRST FLIGHT OF THE DAY, ALL PASSENGER OXYGEN MASKS DROPPED. CHECKED MDC NO FAULT REPORTED. REPLACED CABIN PRESSURE CONTROL IAW AMM 21-33-01 REPACKED PASSENGER MASKS IAW AMM 35-21-09 AND OPERATIONAL TEST PAX OXYGEN MANUAL DEPLOYMENT SYSTEM IAW AMM TASK 35-20-00710-803 CHECKED GOOD. OPERATIONAL TEST OF CABIN PRESSURE CONTROLS PERFORMED IAW AMM 21-31-00-710-801. ALL CHECK GOOD.