Cabin Oxygen Mask Service Recommendations from Original Equipment Manufacturers, and Cabin Oxygen Masks with B/E Aerospace In-line Flow Indicators Part Number (P/N) 118023-02
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What to do
Aircraft owners, operators, and maintenance companies should verify if their oxygen masks contain B/E Aerospace in-line flow indicators P/N 118023-02 and consider replacing them with the improved P/N 118023-12. They should also review and incorporate the latest OEM service recommendations into their maintenance manuals and schedules to monitor mask condition and ensure timely replacement of life-limited components. No mandatory compliance deadline is specified, but proactive adherence is advised.
Summary
EASA Safety Information Bulletin SIB No. 2010-25 provides service recommendations regarding cabin oxygen masks equipped with B/E Aerospace in-line flow indicators part number 118023-02. The bulletin applies to CS1-23 and CS-25 category aeroplanes, including Airbus A318, A319, A320, A321, Boeing 737, 747, 757, 767, 777, and Fokker F28 models. It addresses failures of the in-line flow indicators that can cause oxygen flow interruption during use.
What changed
This bulletin informs operators and maintenance organizations about the potential failure of B/E Aerospace in-line flow indicators P/N 118023-02, manufactured between January 1, 2002, and February 28, 2006, which may break and prevent oxygen flow. It introduces a recommended replacement with an improved design part number 118023-12 and emphasizes adherence to service recommendations from original equipment manufacturers to detect failures early and maintain mask reliability.
Why it matters
The failure of in-line flow indicators in oxygen masks poses a significant safety risk by preventing oxygen delivery when needed. Aviation professionals must ensure that maintenance programs incorporate OEM service recommendations to detect and replace deteriorating components timely. This bulletin highlights the importance of updating maintenance manuals and schedules to reflect these recommendations, thereby enhancing passenger and crew safety.
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