Date: 201307
Location: ZZZ.ARTCC, US
Aircraft: Regional Jet 700 ER/LR (CRJ700)
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Cruise
Airspace: Class A ZZZ
ATC / advisory: Center ZZZ
Aircraft component: Pressurization System
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Pilot Flying; Captain
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Distraction; Workload; Communication Breakdown
Anomaly: Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: Other Post flight
Result: Flight Crew Diverted; General Declared Emergency; General Maintenance Action
Contributing factors: Aircraft; Procedure; Logbook Entry; Human Factors
Primary problem: Aircraft

Narrative: Following an emergency decent that resulted in deploying passenger oxygen masks and a diversion; the Captain made entries into the maintenance log to reflect known messages that were displayed on the ICAS that resulted in the emergency condition. There was a significant level of phone debriefing and discussions with Dispatch; Duty Managers; Chief Pilot; and Maintenance. I was working on ensuring passengers were taken care of; that Operations had a full understanding of the situation and was working with Dispatch on getting a new aircraft to us to take the passengers to their destination. In the span of events that took place I overlooked making a log entry re the failure of Row X CD and Row Y CD passenger oxygen masks to deploy. The paragraph below reflects the incident leading up to this point. 'While in cruise flight at FL390 the 'R BLEED DUCT' master warning occurred with subsequent bleed closure and loss of pressurization. Flight crew took immediate action following QRH reference; initiated an emergency decent to 10;000 FT MSL and alerted ATC and cabin crew of the issue. Our first course of action after stabilizing the decent and finishing the QRH procedure was to choose an emergency alternate airport for landing. We asked for ZZZ initially but ATC advised us that ZZZ was experiencing thunderstorms; we then quickly decided to proceed to ZZZ1 that was ahead of us and soon had the airport in sight while we were still above FL200. During the decent the cabin altitude continued to rise and eventually reached 10;000 FT prompting the 'CABIN ALT' master warning to occur around 17;000 FT. The flight crew took immediate action and followed QRH reference to deploy passenger oxygen masks and continued the emergency decent to 10;000 FT. Once we were in contact with the Approach Controller in ZZZ1 we preceded below 10;000 FT; and the cabin altitude soon was stabilized below 10;000 FT. We then requested vectors to land on Runway 22 which allowed us time to properly set up for a safe approach and landing. I took this opportunity to make a quick PA to the passengers advising them of the issue; our actions; that oxygen was no longer needed and our planned landing at ZZZ1. We landed under visual conditions and I requested that CFR crews remain with the aircraft to the terminal so that we could ensure the status of all the passengers. Once we were at the gate the flight attendants checked on all passengers. When the entire crew was satisfied everyone was okay we sent them into the terminal to await a further update. At this time I released the CFR crews from our position. Dispatch; Maintenance; and the Chief Pilot were then updated on our status.'While debriefing the event after the fact; it was brought to my attention that I did not write up Row X and Y. I realized it was an oversight at that time. The flight crew was saturated with tasks and debriefing following the event. My primary concern was passenger safety and comfort also I was ensuring Dispatch and Operations had detailed information about the event and our current status. In the process of discussing the event with various parties I overlooked the write up for the oxygen mask failure to deploy. This emergency occurred quickly and as with any emergency situation there are many pressing issues that happen after a safe landing. In the future I will personally develop a checklist to make sure that all maintenance and dispatch items are complied with. Having a checklist in the cockpit for post emergency operations would ensure flight crew; Operations; and Maintenance are all on the same page and would help flight crews provide the most detailed information while ensuring operational efficiency.




Synopsis: Following a depressurization event the Captain failed to write up the failure of the O2 masks in two passenger rows to deploy. The reporter cited distractions from multiple post event tasks as a contributing factor.