What was found
PAX O2 DEPLOYMENT SYSTEM FAILS OPS CHECK. THE MASKS AT THE FOLLOWING SEAT LOCATIONS FAILED TO DROP: 10DC, 14DC, 17BA, AND 20BA. TROUBLESHOT AND FOUND LATCHES TO BE BAD. REMOVED AND REPLACED PAX O2 MASK BOX LATCHES FOR SEATS 10DC, 14DC, 17BA, AND 20BA IAW CRJ-900 AMM 35-21-05-000/400-801-A01. PN OFF/ON- CDSP4633-5 PERFORMED OPS CHECK OF PAX O2 MANUAL DEPLOYMENT SYSTEM IAW CRJ-900 AMM TASK 35-20-00-710-803-A01. OPS CKS GOOD AT THIS TIME.