EASA SIB CASA-2020-07
De Havilland Aircraft of Canada Ltd. DHC-8 300/400 Aeroplanes - B/E Aerospace Crew Oxygen Mask
Summary
The Transport Canada Civil Aviation Safety Alert CASA 2020-07 addresses an issue with B/E Aerospace crew oxygen masks on De Havilland Aircraft of Canada Ltd. DHC-8 300 and 400 series aeroplanes. The alert informs operators that some full face crew oxygen masks may be difficult to remove from their stowage cup assemblies due to non-radiused latch tabs. This safety alert provides guidance to improve mask accessibility during emergencies.
What Changed
This CASA introduces the availability of B/E Aerospace Service Bulletin SB 119301-35-001 Rev 000, which provides instructions to rework the oxygen mask cup assembly latch tabs to eliminate the sharp edges causing removal difficulties. It highlights the need to modify the stowage cup to ensure easier and safer mask removal for crew members.
Why It Matters
This issue impacts the safety and efficiency of emergency oxygen mask deployment for crew on DHC-8 300 and 400 aircraft. Operators, maintenance personnel, and compliance teams must address this to prevent delays or complications during emergency situations, thereby ensuring crew safety and regulatory compliance.
What To Do
Operators of DHC-8 300 and 400 aircraft are recommended to complete the rework instructions outlined in B/E Aerospace Service Bulletin SB 119301-35-001 Rev 000 to improve oxygen mask accessibility. For further information, stakeholders should contact Transport Canada Continuing Airworthiness offices as provided. No specific compliance deadline is stated in the document.