Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 87
Troubleshooting; Distraction
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Maintenance
Air Traffic Control Provided Assistance; Flight Crew Took Evasive Action; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Overcame Equipment Problem; Flight Crew Diverted; General Maintenance Action; General Flight Cancelled / Delayed
Aircraft; Human Factors; Procedure
During the final climb phase of Aircraft X (ZZZ-ZZZ1); the aircraft experienced a high-altitude decompression event; the result of a L BLEED DUCT Master Warning and subsequent automatic left and right bleed valve closures. The crew requested priority with ZZZ2 [Center]; initiated a descent and diverted to ZZZ3 for a precautionary landing. The process and procedure of preparing and securing the aircraft for the abnormality; as directed by the appropriate priority and QRH Checklists; was complicated and slowed somewhat by a temporary vision impairment of the Pilot Monitoring (myself) due to an unknown dust or contaminate in the smoke goggle portion of the mask during donning. While climbing through FL316 to a filed cruise altitude of FL360; we were alerted to a potential bleed duct leak by a triple chime; aural 'Bleed Air Duct' and red EICAS message of 'L Bleed Duct'.I would STRONGLY suggest that maintenance inspect; clean and blow out the crew o2 masks / smoke goggles on a regular basis. These masks are checked for air pressure and operation by the flight crew every morning; but the condition and cleanliness of the actual mask is widely unknown until it is needed. The white powdery dust that blew all over my face and lap during the initial use of this very important safety gear could have been a lot worse than it was; possibly creating a crew incapacitation during critical emergency operations.
Captain reported a high altitude cabin depressurization event causing an immediate descent and subsequent request for expedited handling and diversion.